Diastereoselective photochemical synthesis of 3,3′-disubstituted indolines
摘要:
Spiroindoline lactams 9 and imides 11 were efficiently and diastereoselectively prepared by photocyclization of N-arylenaminolactams 8 and esters 5 respectively. Imides 11 were conveniently transformed into the known indolines 13 and 14 which are key intermediates for the synthesis of (+/-)-vindorosine and Aspidosperma alkaloids. (C) 1997 Elsevier Science Ltd.
Spiroindoline lactams 9 and imides 11 were efficiently and diastereoselectively prepared by photocyclization of N-arylenaminolactams 8 and esters 5 respectively. Imides 11 were conveniently transformed into the known indolines 13 and 14 which are key intermediates for the synthesis of (+/-)-vindorosine and Aspidosperma alkaloids. (C) 1997 Elsevier Science Ltd.