@article { ISI:000227615900006, title = {Microwave assisted rapid synthesis of 4-amino-3,4-dihydroquinolin-2-ones from azetidin-2-ones}, journal = {Arkivoc}, number = {1}, year = {2005}, month = {JAN}, pages = {53-64}, publisher = {ARKAT USA INC}, type = {Article}, address = {C/O ALAN R KATRITZKY, UNIV FLORIDA, DEPT CHEMISTRY, PO BOX 117200, GAINESVILLE, FL 32611 USA}, abstract = {

An efficient one-pot synthesis of 4-amino-3,4-dihydroquinolin-2-ones from 3-(2-nitrophenyl)-1, 4-disubstituted azetidin-2-ones is described. Microwave assisted transfer hydrogenation of a nitro group followed by in situ beta-lactam ring opening by the newly formed amino group is the key step in this synthesis.

}, keywords = {4-amino-3, 4-dihydroquinolin-2-ones, azetidin-2-ones, imines, ketenes, Microwave, transfer hydrogenation}, doi = {10.3998/ark.5550190.0006.106}, author = {Shirode, N. M. and Kulkarni, K. C. and Gumaste, V. K. and Deshmukh, A. R. A. S.} } @article { ISI:000227267300021, title = {Synthesis of cis bis-beta-lactams via Staudinger cycloaddition reaction using C-2-symmetric 1,2-diamines}, journal = {Tetrahedron}, volume = {61}, number = {9}, year = {2005}, month = {FEB}, pages = {2441-2451}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

An efficient stereoselective synthesis of bis-beta-lactams via cycloaddition reaction (Staudinger reaction) of ketenes with bisimines derived from C-2-symmetric 1, 2-diamines is described. The reaction provided diastereomeric mixture of meso and C-2-symmetric cis-bis-beta-lactams with higher selectivity for meso-bis-beta-lactams. (C) 2005 Elsevier Ltd. All rights reserved.

}, keywords = {imines, ketenes, Staudinger cyclo-addition reaction, stereoselective synthesis}, issn = {0040-4020}, doi = {10.1016/j.tet.2005.01.031}, author = {Shaikh, A. L. and Puranik, Vedavati G. and Deshmukh, A. R. A. S.} } @article { ISI:000239289800036, title = {Gamma-heteroatom directed stereocontrolled staudinger cycloaddition reaction of vinylketenes and imines}, journal = {Tetrahedron Letters}, volume = {47}, number = {33}, year = {2006}, month = {AUG}, pages = {5993-5996}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Vinylketenes possessing a gamma-heteroatom, on Staudinger cycloaddition reaction with imines gave trans-3-vinyl-beta-lactams in very good yields. The vinyl side chain stereoselectively adopts the Z-configuration in the transition state to stabilize the vinylketene and produces, exclusively, trans-3-vinyl-beta-lactams. (c) 2006 Elsevier Ltd. All rights reserved.

}, keywords = {imines, Staudinger reaction, stereoselective synthesis, vinylketenes}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2006.05.189}, author = {Shaikh, Aarif L. and Puranik, Vedavati G. and Deshmukh, A. R. A. S.} } @article { ISI:000252091800019, title = {Stereoselective synthesis of spiro-beta-lactams using D-(+)-glucose derived chiral pool: remarkable influence of the torquoelectronic effect}, journal = {Tetrahedron}, volume = {63}, number = {37}, year = {2007}, month = {SEP}, pages = {9179-9187}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Diastereoselective synthesis of spiro-beta-lactams via [2+2] cycloaddition reaction of imines and chiral ketenes is described. The chiral ketene was prepared from commercially available, inexpensive D-glucose. Although, theoretically four diastereomers are possible, the reaction yielded only two diastereomers stereoselectively in good to moderate yields. The stereochemical outcome of the reaction was in accordance with the torquoelectronic model. (c) 2007 Elsevier Ltd. All rights reserved.

}, keywords = {imines, ketenes, spiro-beta-lactams, Staudinger reaction, stereoselective synthesis}, issn = {0040-4020}, doi = {10.1016/j.tet.2007.06.073}, author = {Chincholkar, Pinak M. and Puranik, Vedavati G. and Deshmukh, A. R. A. S.} }