Synthesis of α-(3-Indolyl)glycine Derivatives via Spontaneous Friedel-Crafts Reaction between Indoles and Glyoxylate Imines
作者:Biao Jiang、Zuo-Gang Huang
DOI:10.1055/s-2005-869978
日期:——
Mannich-type Friedel-Crafts reaction between indoles and ethyl glyoxylate imines proceeded spontaneously in the absence of an acid catalyst. Ethyl alpha-(3-indolyl)glycinates were obtained in moderate to high yields. Reaction with (R)-alpha-methylbenzylamine derived imine afforded chiral alpha-(3-indolyl)glycinates with good diastereoselectivities (up to 96:4).
potential herbicides, 3-indolylglycines were synthesized using an effective, green and rapid approach via multicomponent reaction (aza-Friedel-Crafts) between indoles, aldehydes and anilines in a water/sodium dodecyl sulfate system. The main advantages of this methodology are ease of handling, scalable to gram scale and a metal-free approach. The reaction is compatible with a variety of functional