Switchable Reactivity of Acylated α, β-Dehydroamino Ester in the Friedel−Crafts Alkylation of Indoles by Changing the Lewis Acid
摘要:
Highly regioselective electrophilic substitution of indoles with N-acetylated alpha,beta-dehydroalanine methyl ester, promoted by different transition metal salts was achieved. The orthogonal regioselectivity provides an efficient protocol toward highly functionalized 3-indolyl-alpha-amino acids. The mechanism of the reactions was explored by NMR studies.
Highly regioselective electrophilic substitution of indoles with N-acetylated alpha,beta-dehydroalanine methyl ester, promoted by different transition metal salts was achieved. The orthogonal regioselectivity provides an efficient protocol toward highly functionalized 3-indolyl-alpha-amino acids. The mechanism of the reactions was explored by NMR studies.
Studies on indolic mould metabolites. Total synthesis of l-prolyl-2-methyltryptophan anhydride and deoxybrevianamide e
作者:R. Ritchie、J.E. Saxton
DOI:10.1016/0040-4020(81)85025-9
日期:1981.1
Syntheses of l - prolyl - 2 - methyl - l - tryptophan anhydride, l -prolyl - 2 - methyl - d - tryptophan anhydride, deoxybrevianamideE, and l - prolyl - 2 - (1,1 - dimethylallyl) - d- tryptophan anhydride are described. A route for the conversion of deoxybrevianamideE into brevianamide E has also been examined.