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A
S. P. Chavan, Kawale, S. A., Patil, N. B., and Kalbhor, D. B., “Application of allylic amine formation from aziridine-2-ol under appel reaction condition: synthesis of N-(tert-butoxycarbonyl)-D-vinyl glycine methyl ester”, Tetrahedron Letters, vol. 73, p. 153119, 2021.
S. P. Chavan and Khatod, H. S., “Application of unusual grignard reaction for the stereoselective synthesis of antidepressant drug (R)-(-)-venlafaxine”, Synthesis-Stuttgart, vol. 49, no. 6, pp. 1410-1418, 2017.
S. P. Chavan, Dumare, N. B., Harale, K. R., and Kalkote, U. R., “Asymmetric total synthesis of (2S,3S)-3-hydroxypipecolic acid”, Tetrahedron Letters, vol. 52, no. 3, pp. 404-406, 2011.
S. P. Chavan, Dumare, N. B., Pawar, K. P., Chavan, P. N., and Khairnar, L. B., “Asymmetric total synthesis of L-allo-1-deoxynojirimycin”, Arkivoc, no. 2, pp. 137-147, 2016.
C
S. P. Chavan, Pasupathy, K., Shengule, S., Shinde, V., and Anand, R., “Catalytic transesterification of beta-ketoesters with zeolite H-FER under solvent free conditions”, Arkivoc, vol. 13, pp. 162-168, 2005.
S. P. Chavan, Pawar, K. P., Praveen, C., and Patil, N. B., “Chirality induction and chiron approaches to enantioselective total synthesis of alpha-lipoic acid”, Tetrahedron, vol. 71, no. 24, pp. 4213-4218, 2015.
S. P. Chavan, Khairnar, L. B., Chavan, P. N., Dumare, N. B., Kalbhor, D. B., and Gonnade, R. G., “Chiron approach to formal synthesis of both antipodes of cis 3-hydroxypipecolic acid”, Tetrahedron Letters, vol. 55, no. 47, pp. 6423-6426, 2014.
S. P. Chavan, Khairnar, L. B., Chavan, P. N., Dumare, N. B., Kalbhor, D. B., and Gonnade, R. G., “Chiron approach to formal synthesis of both antipodes of cis 3-hydroxypipecolic acid (vol 55, pg 6423, 2014)”, Tetrahedron Letters, vol. 61, no. 52, p. 152644, 2020.
S. P. Chavan, Kawale, S. A., and Gonnade, R. G., “cis-aziridine synthon based synthetic investigation for tamiflu employing horner-wadsworth-emmons reaction”, European Journal of Organic Chemistry, vol. 2022, no. 25, p. e202200384, 2022.
S. P. Chavan, Harale, K. R., Dumare, N. B., and Kalkote, U. R., “Convenient formal synthesis of (2S,3S)-3-hydroxy pipecolic acid”, Tetrahedron-Asymmetry, vol. 22, no. 5, pp. 587-590, 2011.
S. P. Chavan, Khobragade, D. A., Pathak, A. B., and Kalkote, U. R., “Convenient formal synthesis of (+/-)-paroxetine”, Synthetic Communications, vol. 37, no. 18, pp. 3143-3149, 2007.
D
S. P. Chavan, Chittiboyina, A. G., Ravindranathan, T., Kamat, S. K., and Kalkote, U. R., “Diastereoselective amidoalkylation of (3S,7aR)-6-benzyl-7-hydroxy-3-phenyltetra-hydro-5H-imidazo[1,5-c][1, 3]thiazol-5-one : a short and highly efficient synthesis of (+)-biotin”, Journal of Organic Chemistry, vol. 70, no. 5, pp. 1901-1903, 2005.
S. P. Chavan, Kalbhor, D. B., and Gonnade, R. G., “Divergent approach to the synthesis of (-)-balanol heterocycle and cis-3-hydroxypipecolic acid based on chiral 2-aminoalkanol equivalent”, Tetrahedron, vol. 80, p. 131773, 2021.
E
S. P. Chavan, Khairnar, L. B., and Chavan, P. N., “Efficient and mild method for preparation of allylic amines from aziridine-2-alcohols using PPh3/I-2/imidazole”, Tetrahedron Letters, vol. 55, no. 43, pp. 5905-5907, 2014.
S. P. Chavan, Dhawane, A. N., and Kalkote, U. R., “Efficient and practical total synthesis of (+/-)-alpha-cuparenone”, Synthesis-Stuttgart , no. 24, pp. 3827-3830, 2007.
S. P. Chavan, Praveen, C., Sharma, P., and Kalkote, U. R., “Efficient stereoselective synthesis of (2S,4S,5R)-(-)- and (2R,4R,5S)-(+)-bulgecinine”, Tetrahedron Letters, vol. 46, no. 3, pp. 439-441, 2005.
S. P. Chavan, Kadam, A. L., and Gonnade, R. G., “Enantioselective formal total synthesis of (-)-quinagolide”, Organic Letters, vol. 21, no. 22, pp. 9089-9093, 2019.
S. P. Chavan, Khairnar, L. B., Pawar, K. P., Chavan, P. N., and Kawale, S. A., “Enantioselective syntheses of (R)-pipecolic acid, (2R,3R)-3-hydroxypipecolic acid, beta-(+)-conhydrine and (-)-swainsonine using an aziridine derived common chiral synthon”, RSC Advances, vol. 5, no. 62, pp. 50580-50590, 2015.
S. P. Panchgalle, Jogdand, G. F., Chavan, S. P., and Kalkote, U. R., “Enantioselective synthesis of (R)-(+)-alpha-lipoic acid via proline-catalyzed sequential alpha-aminoxylation and HWE olefination of aldehyde”, Tetrahedron Letters, vol. 51, no. 27, pp. 3587-3589, 2010.
S. P. Chavan and Khatod, H. S., “Enantioselective synthesis of the essential oil and pheromonal component ar-himachalene by a chiral pool and chirality induction approach”, Tetrahedron-Asymmetry, vol. 23, no. 18-19, pp. 1410-1415, 2012.
A. Tripathi, ,, Llop, J., Chavan, S. P., and Joshi, S. M., “Enolate-mediated regioselective synthesis of 1,2,3-triazoles via azide-aldehydes or ketones [3+2]-cycloaddition reactions in aqueous phase”, Tetrahedron Letters, vol. 61, no. 13, p. 151662, 2020.
S. P. Panchgalle, Kunte, S. S., Chavan, S. P., and Kalkote, U. R., “Exploration of L-proline-catalyzed -aminoxylation of aldehyde to (S)-guaifenesin-related drug molecules”, Synthetic Communications, vol. 41, no. 13, p. PII 937137930, 2011.
S. P. Chavan, Khatod, H. S., Das, T., and Vanka, K., “Exploration of the diastereoselectivity in an unusual Grignard reaction and its application towards the synthesis of styryl lactones 7-epi-(+)-goniodiol and 8-epi-(-)-goniodiol”, RSC Advances, vol. 6, no. 56, pp. 50721-50725, 2016.
F
S. P. Chavan, Chavan, P. N., Lasonkar, P. B., Khairnar, L. B., and Kadam, A. L., “Facile and convenient synthesis of (+/-)-Biotin via MgCl2/Et3N-mediated C-C coupling and mitsunobu reaction”, Synlett, vol. 25, no. 20, pp. 2879-2882, 2014.
S. P. Chavan, Kale, R. R., and Pasupathy, K., “Facile regioselective decomposition of tosylhydrazones: an application towards the synthesis of alpha-lipoic acid”, Synlett, no. 7, pp. 1129-1132, 2005.
S. P. Chavan, Dhawane, A. N., and Kalkote, U. R., “Facile total synthesis of (+/-)-alpha-cuparenone employing diallylation and RCM as key steps”, Tetrahedron Letter, vol. 48, no. 6, pp. 965-966, 2007.
S. P. Chavan, Thakkar, M., Kharul, R. K., Pathak, A. B., Bhosekar, G. V., and Bhadbhade, M. M., “First enantiospecific synthesis of (+)-beta-herbertenol”, Tetrahedron, vol. 61, no. 15, pp. 3873-3879, 2005.
S. P. Chavan, Thakkar, M., and Kalkote, U. R., “First enantiospecific synthesis of (-)-heritol: absolute configuration determination”, Tetrahedron Letters, vol. 48, no. 4, pp. 643-646, 2007.
S. P. Chavan, Thakkar, M., Jogdand, G. F., and Kalkote, U. R., “First enantiospecific synthesis of (-)-parvifoline and (-)-curcuquinone”, Journal of Organic Chemistry, vol. 71, no. 23, pp. 8986-8988, 2006.
H. B. Borate, Maujan, S. R., Sawargave, S. P., Chandavarkar, M. A., Vaiude, S. R., Joshi, V. A., Wakharkar, R. D., Iyer, R., Kelkar, R. G., Chavan, S. P., and Kunte, S. S., “Fluconazole analogues containing 2H-1,4-benzothiazin-3(4H)-one or 2H-1,4-benzoxazin-3(4H)-one moieties, a novel class of anti-Candida agents”, Bioorganic & Medicinal Chemistry Letters, vol. 20, no. 2, pp. 722-725, 2010.
S. P. Chavan, Dumare, N. B., and Pawar, K. P., “Formal syntheses of (2R,3R)-3-hydroxy pipecolic acid and (2R,3S)-3-hydroxy pipecolic acid from L-ascorbic acid”, Tetrahedron Letters, vol. 56, no. 6, pp. 805-807, 2015.
S. P. Chavan, Kawale, S. A., and Chavan, P. N., “Formal synthesis of brivaracetam: a key to construct the pyrrolidone scaffold using Pd-catalyzed oxidative cyclization and ring-closing metathesis reaction”, Tetrahedron Letters, vol. 60, no. 46, p. 151249, 2019.
S. P. Chavan, Dhawane, A. N., and Kalkote, U. R., “Formal synthesis of (+/-)-camptothecin via tricyclic lactone as key synthon”, Tetrahedron Letters, vol. 51, no. 23, pp. 3099-3101, 2010.
S. P. Chavan, Kawale, S. A., Pisal, M. M., Kadam, A. L., and Gonnade, R. G., “Formal synthesis of (-)-quinagolide: diastereoselective ring expansion via a bicyclic aziridinium ion strategy to access the octahydrobenzo[g]quinoline architecture”, Journal of Organic Chemistry, vol. 86, no. 14, pp. 9344-9352, 2021.
S. P. Chavan, Harale, K. R., Puranik, V. G., and Gawade, R. L., “Formal synthesis of (-)-stemoamide using a useful epimerization at C-8”, Tetrahedron Letters, vol. 53, no. 21, pp. 2647-2650, 2012.
S. P. Chavan, Kadam, A. L., Shinde, S. S., and Gonnade, R. G., “Furan-derived chiral bicycloaziridino lactone synthon: collective syntheses of oseltamivir phosphate (Tamiflu), (S)-pipecolic acid and its 3-hydroxy derivatives”, Chemistry-An Asian Journal, vol. 15, no. 3, pp. 415-424, 2020.
H
S. P. Chavan, Garai, S., and Kalkote, U. R., “Highly diastereoselective total synthesis of (+/-)-heritonin and (+/-)-heritol”, Tetrahedron, vol. 68, no. 40, pp. 8509-8514, 2012.
M. M. Pisal, Nawale, L. U., Patil, M., Bhansali, S. G., Gajbhiye, J. M., Sarkar, D., Chavan, S. P., and Borate, H. B., “Hybrids of thienopyrimidinones and thiouracils as anti-tubercular agents: SAR and docking studies”, European Journal of Medicinal Chemistry, vol. 127, 2017.
M
S. P. Chavan, Ethiraj, K. S., and Dantale, S. W., “MgBr2-mediated ionic Diels-Alder reaction of acetals of alpha,beta-unsaturated aldehydes and ketones with 1,3-dienes”, Synthetic Communications, vol. 37, no. 14, pp. 2337-2343, 2007.
N. B. Patil, Atapalkar, R. S., Chavan, S. P., and Kulkarni, A. A., “Multi-step synthesis of miltefosine: integration of flow chemistry with continuous mechanochemistry”, Chemistry-A European Journal, vol. 27, no. 70, pp. 17695-17699, 2021.
N
S. P. Chavan, Dumare, N. B., and Pawar, K. P., “Novel, concise and efficient protocol for non-natural piperidine compounds”, RSC Advances, vol. 4, no. 62, pp. 32594-32598, 2014.
H. B. Borate, Sawargave, S. P., Chavan, S. P., Chandavarkar, M. A., Iyer, R., Tawte, A., Rao, D., Deore, J. V., Kudale, A. S., Mahajan, P. S., and Kangire, G. S., “Novel hybrids of fluconazole and furanones: design, synthesis and antifungal activity”, Bioorganic & Medicinal Chemistry Letters, vol. 21, no. 16, pp. 4873-4878, 2011.
O
S. P. Chavan and Lasonkar, P. B., “One-pot migration-formylation of benzyl aryl ethers under duff reaction condition”, Tetrahedron Letters, vol. 54, no. 32, pp. 4789-4792, 2013.
H. B. Borate, Gaikwad, S. H., Kudale, A. S., Chavan, S. P., Pharande, S. G., Wagh, V. D., and Sawant, V. S., “One-step method for the synthesis of aryl olefins from aryl aldehydes and aliphatic aldehydes”, Tetrahedron Letters, vol. 54, no. 12, pp. 1528-1530, 2013.
S. P. Sawargave, Kudale, A. S., Deore, J. V., Bhosale, D. S., Divse, J. M., Chavan, S. P., and Borate, H. B., “One-step synthesis of 4-alkyl-3-aryl-2,6-dicyanoanilines and their use in the synthesis of highly functionalized 2,3,5,6,7-and 2,3,4,5,7-substituted indoles”, Tetrahedron Letters, vol. 52, no. 42, pp. 5491-5493, 2011.
S. P. Panchgalle, Bidwai, H. B., Chavan, S. P., and Kalkote, U. R., “Organocatalytic asymmetric synthesis of (-)-delta-coniceine based on sequential proline-catalyzed asymmetric alpha-amination-HWE olefination”, Tetrahedron-Asymmetry, vol. 21, no. 19, pp. 2399-2401, 2010.
S. P. Panchgalle, Gore, R. G., Chavan, S. P., and Kalkote, U. R., “Organocatalytic enantioselective synthesis of beta-blockers: (S)-propranolol and (S)-naftopidil”, Tetrahedron-Asymmetry, vol. 20, no. 15, pp. 1767-1770, 2009.
A. Sharma, Chavan, S. P., and Venkatraman, M. S., “ORGN 511-Total synthesis of 7-chloro-10-methoxycamptothecin: an important synthon for commercially important derivatives of camptothecin”, Abstracts of Papers of the American Chemical Society, vol. 235, 2008.
P
S. P. Chavan, Sharma, P., Sivappa, R., and Kalkote, U. R., “Practical and facile approach towards indole alkaloids: (-)-mitralactonine”, Synlett, no. 1, pp. 79-82, 2007.
S. P. Chavan, Pathak, A. B., and Kalkote, U. R., “Practical formal synthesis of camptothecin”, Tetrahedron Letter, vol. 48, no. 37, pp. 6561-6563, 2007.
S. P. Chavan, Khobragade, D. A., Thakkar, M., and Kalkote, U. R., “Practical synthesis of (+/-)-venlafaxine”, Synthetic Communications, vol. 37, no. 22-24, pp. 3901-3906, 2007.
S. P. Chavan, Pawar, K. P., and Garai, S., “Protecting group free and scalable approach towards total synthesis of (-)-venlafaxine”, RSC Advances, vol. 4, no. 28, pp. 14468-14470, 2014.
R
S. P. Chavan, Kalbhor, D. B., and Gonnade, R. G., “Rapid bioinspired N-acyliminium ion strategy for the ABC core of the stemona alkaloids”, Asian Journal of Organic Chemistry, vol. 12, no. 9, 2023.
S. P. Chavan, Kalbhor, D. B., and Gonnade, R. G., “Rapid synthesis of the epi-biotin sulfone via tandem S,N-carbonyl migration/aza-michael/spirocyclization and haller-bauer reaction”, ACS Omega, vol. 7, no. 20, pp. 17215-17222, 2022.
S. P. Chavan, Kawale, S. A., Tripathi, A., Kadam, A. L., and Gonnade, R. G., “Revisiting classical pummerer cyclization reaction: a key strategy for the synthesis of (+/-)-quinagolide”, ChemistrySelect, vol. 7, no. 28, p. e202201600, 2022.
S. P. Chavan, Sharma, P., Sivappa, R., and Kalkote, U. R., “Ring closing metathesis approach to the indole alkaloid mitralactonine”, Tetrahedron Letters, vol. 47, no. 52, pp. 9301-9303, 2006.
S
S. P. Chavan, Pawar, A. A., Patil, N. B., Kadam, A. L., and Shinde, S. S., “Scalable synthesis of 3-Ethyl-4-methyl-1,5-dihydro-2H-pyrrol-2-one: an important building block of the antidiabetic drug glimepiride”, Synthesis-Stuttgart, vol. 52, no. 22, pp. 3480-3484, 2020.
S. P. Chavan, Pathak, A. B., Pandey, A., and Kalkote, U. R., “Short and efficient synthesis of rubrolide E”, Synthetic Communications, vol. 37, no. 22-24, pp. 4253-4263, 2007.
S. P. Chavan, Khairnar, L. B., Chavan, P. N., and Kalbhor, D. B., “Short enantioselective total synthesis of (R)- and (S)-pipecolic acid”, Tetrahedron-Asymmetry, vol. 25, no. 16-17, pp. 1246-1251, 2014.
S. P. Chavan, Harale, K. R., and Pawar, K. P., “Short synthesis of (2S,3S)-3-hydroxypipecolic acid”, Tetrahedron Letters, vol. 54, no. 36, pp. 4851-4853, 2013.
S. P. Chavan, Kharul, R. K., Kamat, S. K., Kalkote, U. R., and Kale, R. R., “Simple, concise, stereocontrolled synthesis of (8E,10Z)-pentadecadien-1-ol acetate”, Synthetic Communications, vol. 35, no. 7, pp. 987-994, 2005.
S. P. Chavan and Lasonkar, P. B., “Simple synthesis of the novel antihistaminic drug olopatadine hydrochloride”, Synthesis-Stuttgart, vol. 45, no. 24, pp. 3399-3403, 2013.
S. P. Chavan, Shivsankar, K., and Pasupathy, K., “Simplistic expedient and practical synthesis of (+/-)-alpha-lipoic acid”, Synthesis-Stuttgart, no. 8, pp. 1297-1300, 2005.
S. P. Chavan and Praveen, C., “Stereoselective synthesis of (-)-microcarpalide”, Tetrahedron Letters, vol. 46, no. 11, pp. 1939-1941, 2005.
S. P. Chavan, Chavan, P. N., and Gonnade, R. G., “Stereospecific synthetic approach towards tamiflu using the ramberg-backlund reaction from cysteine hydrochloride”, RSC Advances, vol. 4, no. 107, pp. 62281-62284, 2014.
M. M. Pisal, Annadate, R. A., Athalye, M. C., Kumar, D., Chavan, S. P., Sarkar, D., and Borate, H. B., “Synthesis and cell imaging applications of fluorescent mono/di/tri-heterocycl- yl-2,6-dicyanoanilines”, Bioorganic & Medicinal Chemistry Letters, vol. 27, no. 4, pp. 979-988, 2017.
M. M. Pisal, Annadate, R. A., Athalye, M. C., Kumar, D., Chavan, S. P., Sarkar, D., and Borate, H. B., “Synthesis and cell imaging applications of fluorescent mono/di/tri-heterocyclyl-2,6-dicyanoanilines (vol 27, pg 979, 2017)”, Bioorganic & Medicinal Chemistry Letters, vol. 32, p. 127737, 2021.
S. P. Chavan, Kadam, A. L., Lasonkar, P. B., and Gonnade, R. G., “Synthesis of 3-azidopiperidine skeleton employing ceric ammonium nitrate (CAN)-mediated regioselective azidoalkoxylation of enol ether: total synthesis of d-2 receptor agonist (+/-)-quinagolide”, Organic letters , vol. 20, no. 22, pp. 7011-7014, 2018.
S. P. Chavan, Pathak, A. B., and Pawar, K. P., “Synthesis of 3-ethyl-4-metyl-1h,5-dihydro-2h-pyrrol-2-one by novel palladium(ii)-catalyzed cyclization and ring-closing metathesis”, Synthesis-Stuttgart, vol. 47, no. 7, pp. 955-960, 2015.
S. P. Chavan and Venkatraman, M. S., “Synthesis of (+)-camptothecin”, Arkivoc, vol. 2005, no. 3, pp. 165-169, 2005.
T
S. P. Chavan, Dhawane, A. N., and Kalkote, U. R., “Tandem aza-michael-condensation-aldol cyclization reaction: approach to the construction of DE synthon of (+/-)-camptothecin”, Synlett, no. 18, pp. 2781-2784, 2008.
S. P. Chavan, Dumare, N. B., and Pawar, K. P., “Total syntheses of D-allo-1-deoxynojirimycin and L-talo-1-deoxynojirimycin via reductive cyclization”, RSC Advances, vol. 4, no. 77, pp. 40852-40858, 2014.
S. P. Chavan, Pathak, A. B., and Kalkote, U. R., “Total synthesis of (+)-camptothecin via an intramolecular palladium-catalyzed cyclization strategy”, Synlett, no. 17, pp. 2635-2638, 2007.
S. P. Chavan, Pathak, A. B., Dhawane, A. N., and Kalkote, U. R., “Total synthesis of pulchellalactam via an RCM strategy”, Synthetic Communications, vol. 37, no. 7-9, pp. 1503-1510, 2007.
S. P. Chavan, Kadam, A. L., and Kawale, S. A., “Total synthesis of (+/-)-quinagolide: a potent D-2 receptor agonist for the treatment of hyperprolactinemia”, ACS Omega, vol. 4, no. 5, pp. 8231-8238, 2019.
A. N. Purude, Pawar, K. P., Patil, N. B., Kalkote, U. R., and Chavan, S. P., “Total synthesis of (R)-lipoic acid and (S)-lipoic acid via an Mn (III)-salen-catalyzed oxidative kinetic resolution”, Tetrahedron-Asymmetry, vol. 26, no. 5-6, pp. 281-287, 2015.
U
S. R. Bavikar, Lasonkar, T. P., Chavan, S. P., and Borate, H. B., “Unusual, selective, reductive, deoxygenation of cyclopentenone alcohols”, Tetrahedron Letters, vol. 55, no. 38, pp. 5241-5243, 2014.
S. P. Chavan, Chittiboyina, A. G., Ramakrishna, G., Tejwani, R. B., Ravindranathan, T., Kamat, S. K., Rai, B., Sivadasan, L., Balakrishnan, K., Ramalingam, S., and Deshpande, V. H., “Unusual stereochemical outcome of radical cyclization: synthesis of (+)-biotin”, Tetrahedron, vol. 61, no. 39, pp. 9273-9280, 2005.
V
S. P. Chavan and Harale, K. R., “Very practical and selective method for PMB protection of alcohols”, Tetrahedron Letters, vol. 53, no. 35, pp. 4683-4686, 2012.