The first enantiospecific synthesis of a thapsane, containing three contiguous quaternary carbon atoms, is accomplished starting from R-carvone. An intramolecular alkylation and an intramolecular diazoketone cyclopropanation reaction were employed for the stereo- and regiospecific generation of three contiguous quaternary carbon atoms present in the thapsane framework. (C) 2000 Published by Elsevier Science Ltd.
Srikrishna; Reddy, T Jagadeeswara; Kumar, P Praveen, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 9, p. 1518 - 1525
作者:Srikrishna、Reddy, T Jagadeeswara、Kumar, P Praveen