Brønsted acid catalysed electrophilic substitution of indole by allylic alcohols in lithium perchlorate–diethyl ether: application to the total synthesis of yuehchukene
作者:Kenneth J. Henry、Paul A. Grieco
DOI:10.1039/c39930000510
日期:——
A novel carbonâcarbon bond-forming reaction between indole and ββ-disubstituted allylic alcohols in lithium perchlorateâdiethyl ether containing a catalytic amount of a Brønsted acid is described; the reaction has been applied to a total synthesis of yuehchukene.
Various aromatic and heteroaromatic compounds undergo smooth alkylation with cyclic allylic acetates in the presence of 10 mol% of indium trichloride under mild conditions to afford 3-substituted indoles, 2-substituted furan and pyrrole and cyclohexenyl-substituted arenes in good yields with high selectivity.