A short enantioselective synthesis of (+)-L-733,060 via Shi epoxidation of a homoallylic carboxylate
摘要:
A short and efficient enantioselective synthesis of (+)-L-733,060 in 92% ee via Shi epoxidation of a homoallylic carboxylate is described. Johnson-Claisen rearrangement was employed to obtain the required carbon backbone, whilst intramolecular reductive O-to-N-ring expansion of a delta-azidolactone was used in the construction of the piperidine moiety. (C) 2008 Elsevier Ltd. All rights reserved.
Synthesis of (+)-L-733,060, (+)-CP-99,994 and (2S,3R)-3-hydroxypipecolic acid: Application of an organocatalytic direct vinylogous aldol reaction
作者:Sunil V. Pansare、Eldho K. Paul
DOI:10.1039/c2ob06644k
日期:——
The γ-butenolide obtained from an organocatalyzed, direct vinylogous aldol reaction of γ-crotonolactone and benzaldehyde serves as the key starting material in the expedient synthesis of a 3-hydroxy-2-phenyl piperidine intermediate which is converted to the target 2,3-disubstituted piperidines.
A short enantioselective synthesis of (+)-L-733,060 via Shi epoxidation of a homoallylic carboxylate
作者:Lourdusamy Emmanuvel、Arumugam Sudalai
DOI:10.1016/j.tetlet.2008.07.086
日期:2008.9
A short and efficient enantioselective synthesis of (+)-L-733,060 in 92% ee via Shi epoxidation of a homoallylic carboxylate is described. Johnson-Claisen rearrangement was employed to obtain the required carbon backbone, whilst intramolecular reductive O-to-N-ring expansion of a delta-azidolactone was used in the construction of the piperidine moiety. (C) 2008 Elsevier Ltd. All rights reserved.