@article { ISI:000293230300022, title = {Concurrent display of both alpha- and beta-turns in a model peptide}, journal = {Organic \& Biomolecular Chemistry}, volume = {9}, number = {16}, year = {2011}, month = {MAY}, pages = {5762-5765}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

This article describes a model peptide that concurrently displays both alpha- and beta-turns, as demonstrated by structural investigations using single crystal X-ray crystallography and solution-state NMR studies. The motif reported herein has the potential for the design of novel conformationally ordered synthetic oligomers with structural architectures distinct from those classically observed.

}, issn = {1477-0520}, doi = {10.1039/c1ob05553d}, author = {Srinivas, Deekonda and Vijayadas, Kuruppanthara N. and Gonnade, Rajesh G. and Phalgune, Usha D. and Rajamohanan, Pattuparambil R. and Sanjayan, Gangadhar J.} } @article { ISI:000287374800008, title = {Phytochemical investigation of artemisia pallens}, journal = {Helvetica Chimica Acta}, volume = {94}, number = {1}, year = {2011}, month = {JAN}, pages = {73-77}, publisher = {WILEY-BLACKWELL}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

Two new eudesmanolides, pallensin (1) and 4-epipallensin (2), along with a known eudesmanolide, santonin, and a known flavone, 4-epivalgarin, have been isolated from the aerial part of A. pallens. Their structures were established by detailed spectral studies (1D and 2D) and by comparison of their spectroscopic data with those of known compounds.

}, issn = {0018-019X}, doi = {10.1002/hlca.201000125}, author = {Ruikar, Anjali D. and Jadhav, Ravindra B. and Phalgune, Usha D. and Rojatkar, Supada R. and Puranik, Vedavati G. and Deshpande, Nirmala R.} } @article { ISI:000308519200010, title = {Larvicidal potential of mimusops elengi against aedes aegypti (L) and Culex quinquefasciatus (Say)}, journal = {Journal of Vector Borne Diseases}, volume = {49}, number = {2}, year = {2012}, month = {JUN}, pages = {111-113}, publisher = {MALARIA RESEARCH CENTRE, INDIAN COUNCIL MEDICAL RESEARCH-ICMR}, address = {22 SHAM NATH MARG, DELHI, 00000, INDIA}, keywords = {Aedes aegypti, Culex quinquefasciatus, larvicidal activity, Mimusops elengi}, issn = {0972-9062}, author = {Ruikar, Anjali D. and Pawar, Pushpa V. and Sen, Avalokiteswar and Phalgune, Usha D. and Puranik, Vedavati G. and Deshpande, Nirmala R.} } @article { ISI:000326674800001, title = {GIAO/DFT studies on 1,2,4-triazole-5-thiones and their propargyl derivatives}, journal = {Magnetic Resonance in Chemistry}, volume = {51}, number = {12}, year = {2013}, month = {DEC}, pages = {767-774}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Density functional theory (DFT)/Becke-Lee-Yang-Parr (B3LYP) and gauge-including atomic orbital (GIAO) calculations were performed on a number of 1,2,4-triazole derivatives, and the optimized structural parameters were employed to ascertain the nature of their predominant tautomers. C-13 and N-15 NMR chemical shifts of 3-substituted 1,2,4-triazole-5-thiones and their propargylated derivatives were calculated via GIAO/DFT approach at the B3LYP level of theory with geometry optimization using a 6-311++G** basis set. A good agreement between theoretical and experimental C-13 and N-15 NMR chemical shifts could be found for the systems investigated. The data generated were useful in predicting N-15 chemical shifts of all the nitrogen atoms of the triazole ring, some of which could not be obtained in solution state N-15 HMBC/HSQC NMR measurements. The energy profile computed for the dipropargylated derivatives was found to follow the product distribution profile of regioisomers formed during propargylation of 1,2,4-triazole thiones. Copyright (c) 2013 John Wiley \& Sons, Ltd.

}, keywords = {1, 2, 4-triazole-5-thiones, C-13, DFT, GIAO, N-15, NMR, Regioisomers, tautomers}, issn = {0749-1581}, doi = {10.1002/mrc.4012}, author = {Phalgune, Usha D. and Vanka, Kumar and Rajamohanan, P. R.} } @article { ISI:000326465600015, title = {New dipyranocoumarin from the leaves of calophyllum apetalum willd}, journal = {Natural Product Research}, volume = {27}, number = {20}, year = {2013}, month = {OCT}, pages = {1896-1901}, publisher = {TAYLOR \& FRANCIS LTD}, address = {4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND}, abstract = {

A new dipyranocoumarin, -hydroxytomentolide A (1) was isolated from the leaves of Calophyllum apetalum together with the known compounds friedelin (2), apetalactone (3), inophyllum C (4) and canophyllol (5). The structure of the new compound was established by spectroscopic studies which include H-1 NMR, C-13 NMR, NOESY, HetCOSY, COLOC experiments and single crystal X-ray diffraction analysis.

}, keywords = {-hydroxytomentolide A, Calophyllum apetalum, dipyranocoumarins, Guttiferae, Triterpenoids}, issn = {1478-6419}, doi = {10.1080/14786419.2013.784869}, author = {Joshi, Swati P. and Kulkarni, Smita R. and Phalgune, Usha D. and Puranik, Vedavati G.} }