Room temperature ionic liquids promoted three-component coupling reactions: a facile synthesis of cis-isoquinolonic acids
作者:J.S Yadav、B.V.S Reddy、K Saritha Raj、A.R Prasad
DOI:10.1016/s0040-4020(03)00076-0
日期:2003.3
Roomtemperature ionic liquids are found to catalyze efficiently the three component-coupling reactions of aldehydes, amines and homophthalic anhydride under mild and convenient conditions to afford the corresponding cis-isoquinolonic acids in excellent yields with high cis-selectivity.
Iodine as a Mild, Efficient, and Cost-Effective Reagent for the Synthesis of <i>cis</i>-1-Oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylic Acids
作者:J. Yadav、B. Reddy、A. Reddy、A. Narsaiah
DOI:10.1055/s-2007-983899
日期:2007.10
Arylimines generated in situ from aromatic aldehydes and anilines undergo smooth coupling with homophthalic anhydride in the presence of 10 mol% of molecular iodine under mild and neutral conditions to afford the corresponding cis-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylic acids in excellent yields with high cis selectivity. The use of iodine makes this procedure simple, convenient, and cost-effective.