First synthesis of (−)-(1R,4R)- and (+)-(1S,4S)-(7,7-dimethyl-2-methylene-bicyclo[2.2.1]hept-1-yl)-methanol: new fenchone-derived chiral auxiliaries
摘要:
The treatment of (+)- or (-)-fenchones epoxides with 1:2 85% H3PO4:DMSO for 30 min at 20 degreesC induced an enantiospecific Wagner-Meerwein rearrangement affording new C(10)-O-substituted camphor derivatives which could prove useful as chiral auxiliaries. (C) 2001 Elsevier Science Ltd. All rights reserved.