A novel approach towards the construction of the galanthamine skeleton was demonstrated by the Pd-catalyzed cyclization of N-[2-(1,4-dioxa-spiro[4,5]dec-7-en-8-yl)-ethyl]-2-iodo-4-methoxy-N-methyl-benzamide (23), with formation of the benzazepine ring and creation of a quaternary carbon.
Chemoenzymatic synthesis of rengyoside -A, -B, isorengyoside and synthesis of their aglycones
作者:Annunziata Soriente、Anna Della Rocca、Guido Sodano、Antonio Trincone
DOI:10.1016/s0040-4020(97)00138-5
日期:1997.3
The chemoenzymatic synthesis of a group of naturally occurring cyclohexylethanoids, rengyoside-A, -B and isorengyoside, has been performed by enzymatic glucosidation of their chemically synthesized aglycones, rengyol, rengyoxide and isorengyol. (C) 1997 Published by Elsevier Science Ltd.