Stereoselectivity in the cyclisation of photoinduced electron transfer (PET) generated cyclic (α -amino radicals: First general stereoselective entry to 1-azabicyclo (m:n:o) alkane systems
摘要:
Stereoselectivity in the intramolecular cyclisation of PET-generated cyclic alpha-amino radicals and its application to the synthesis of 1-azabicyclo (m:n:o) alkane systems is reported.
Stereoselectivity in the photoinduced electron transfer (PET) promoted intramolecular cyclisations of 1-alkenyl-2-silyl-piperidines and -pyrrolidines: rapid construction of 1-azabicyclo[m.n.0]alkanes and stereoselective synthesis of (±)-isoretronecanol and (±)-epilupinine
PET promoted cyclisations of 1-alkenyl-2-silyl-pyrrolidines and -piperidines 9a-d to 1-aza-bicyclo[m.n.0]alkanes have been found to be stereoselective. The five-membered ring formation gives predominantly cis products while six-membered rings are trans. Application of such cyclisations to the synthesis of (+/-)-isoretronecanol 22a, (+/-)-epilupinine 29 and related alkaloids has been demonstrated.
Stereoselectivity in the cyclisation of photoinduced electron transfer (PET) generated cyclic (α -amino radicals: First general stereoselective entry to 1-azabicyclo (m:n:o) alkane systems
作者:Ganesh Pandey、G.Devi Reddy
DOI:10.1016/s0040-4039(00)79035-6
日期:1992.10
Stereoselectivity in the intramolecular cyclisation of PET-generated cyclic alpha-amino radicals and its application to the synthesis of 1-azabicyclo (m:n:o) alkane systems is reported.