Diastereoselective Domino Reactions of Chiral 2-Substituted 1-(2′,2′,3′,3′-Tetramethylcyclopropyl)-alkan-1-ols under Friedel−Crafts Conditions
作者:Daniel Stadler、Thorsten Bach
DOI:10.1021/jo900445c
日期:2009.7.3
shift to allylic cations I. The latter cations are eventually attacked by the arene nucleophile. The diastereoselectivity of this process is good (anti-preference for Ph, CN, PO(OEt)2) to excellent (syn-preference for tBu). The esters 7, carrying a methoxycarbonyl group in 2-position, yielded under the same reaction conditions products 25 and 26, which are formed by an intermolecular Friedel−Crafts reaction