Enantioselective Spirocyclizations from Tryptophanol-Derived Oxazolopiperidone Lactams
摘要:
A straightforward synthetic route to enantiopure spiro[indole-3,3'-indolizidines] is reported. The key step is a Lewis acid promoted cyclization of a N-a-tosyltryptophanol-derived oxazolopiperidone lactam in the presence of Et3SiH.
Enantioselective Spirocyclizations from Tryptophanol-Derived Oxazolopiperidone Lactams
摘要:
A straightforward synthetic route to enantiopure spiro[indole-3,3'-indolizidines] is reported. The key step is a Lewis acid promoted cyclization of a N-a-tosyltryptophanol-derived oxazolopiperidone lactam in the presence of Et3SiH.