Enantioselective Alkoxycyclization of 1,6‐Enynes with Gold(I)‐Cavitands: Total Synthesis of Mafaicheenamine C
作者:Inmaculada Martín‐Torres、Gala Ogalla、Jin‐Ming Yang、Antonia Rinaldi、Antonio M. Echavarren
DOI:10.1002/anie.202017035
日期:2021.4.19
cyclization has been applied for the first totalsynthesis of carbazole alkaloid (+)‐mafaicheenamine C and its enantiomer, establishing its configuration as R. The cavity effect was also evaluated in the cycloisomerization of dienynes. A combination of experiments and theoretical studies demonstrates that the cavity of the gold(I) complexes forces the enynes to adopt constrained conformations, which results
Carbazole alkaloid mukonine 6b was prepared from 3-formylindole in three steps (32% overall yield). The key step was the base-promoted cyclization of a mixed anhydride of mono ester mono acid 5 (C) 1998 Elsevier Science Ltd. All rights reserved.