@article { ISI:000359134700008, title = {Efficient one pot regioselective synthesis of a 3,3 {\textquoteleft}-spiro-phosphonylpyrazole-oxindole framework via base mediated [1,3]-dipolar cycloaddition reaction of the Bestmann-Ohira reagent with methyleneindolinones}, journal = {Organic \& Biomolecular Chemistry}, volume = {13}, number = {32}, year = {2015}, month = {JUL}, pages = {8669-8675}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A one pot, highly regioselective synthesis of racemic 3,3{\textquoteright}-spiro-phosphonylpyrazole-oxindole by 1,3-dipolar cycloaddition of an in situ generated anion of dialkyl 1-diazomethylphosphonate from the Bestmann-Ohira reagent (BOR) \& methyleneindolinones has been developed. The synthesis affords the highly functionalized pyrazole scaffolds in good yields with excellent regioselectivity under mild reaction conditions within a short reaction time.

}, issn = {1477-0520}, doi = {10.1039/c5ob01020a}, author = {Shelke, Anil M. and Suryavanshi, Gurunath} } @article { ISI:000363828500010, title = {Efficient organocatalytic route for asymmetric total synthesis of stagonolide F}, journal = {Tetrahedron Letters}, volume = {56}, number = {45}, year = {2015}, month = {NOV}, pages = {6207-6209}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A stereoselective total synthesis of Stagonolide F (98\% ee) is described employing asymmetric alpha-aminooxylation, Jorgensen{\textquoteright}s asymmetric epoxidation, Brown asymmetric allylation, Steglich esterification and ring closing metathesis as key steps. The use of organocatalytic alpha-aminooxylation and Jorgensen{\textquoteright}s asymmetric epoxidation of aldehydes for the introduction of chirality makes this approach more attractive. (C) 2015 Elsevier Ltd. All rights reserved.

}, keywords = {alpha-Aminooxylation, Jorgensens{\textquoteright}s asymmetric epoxidation, Macrolide, Ring-closing metathesis, Total synthesis}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2015.09.082}, author = {Shelke, Anil M. and Suryavanshi, Gurunath} } @article {43539, title = {Efficient Sn(II)-catalyzed one-pot synthesis of a 3-substituted azetidine-2,4-dione framework}, journal = {Organic \& Biomolecular Chemistry}, volume = {15}, year = {2017}, month = {MAR}, pages = {2385-2391}, abstract = {A novel Sn(II)-catalyzed tandem cyclization reaction of aromatic aldehydes with ethyl cyanoacetate has been achieved to afford a series of 3-substituted azetidine-2,4-diones in good to excellent yields. This protocol provides straightforward access to construct the azetidine core through sequential Knoevenagel condensation, hydration and the C-N cyclization reaction.}, doi = {10.1039/c7ob00294g}, author = {Chavan, Santosh S. and Supekar, Mrudul V. and Burate, Pralhad A. and Rupanwar, Bapurao D. and Shelke, Anil M. and Suryavanshi, Gurunath} } @article {49124, title = {Enantioselective synthesis of (+)-Sedridine, (-)-Allosedridine and their N-Methyl analogs via Maruoka-Keck allylation and CBS reduction}, journal = {Natural Product Research }, volume = {37}, year = {2023}, month = {OCT}, pages = {3388-3394}, type = {Article}, abstract = {

A simple synthetic approach has been developed for the enantioselective total synthesis of (+)-Sedridine, (-)-Allosedridine and their analogs such as (+)-N- Methyl Sedridine and (-)-N-Methylallosedridine. The synthesis was achieved by using commercially available starting materials via Maruoka-Keck allylation, Wacker oxidation, and CBS reduction. The synthetic root provides a good diastereomeric ratio and high yields.

}, keywords = {CBS reduction, Maruoka-Keck allylation, Piperidine, Wacker oxidation}, issn = {1478-6419}, doi = {10.1080/14786419.2022.2076229}, author = {Bhoite, Shubhangi P. and Suryavanshi, Gurunath} }