Palladium-catalyzed asymmetric three-component reaction between glyoxylic acid, sulfonamides and arylboronic acids for the synthesis of -arylglycine derivatives.

A palladium-catalyzed asymmetric three-component synthesis of -arylglycine derivatives starting from glyoxylic acid, sulfonamides and arylboronic acids is reported. This novel, operationally simple method offers access to the -arylglycine scaffold in good yields and enantioselectivities. The utilization of α tailored catalyst system enables the enantioselective synthesis of the desired -arylglycines despite a fast racemic background reaction. The obtained products can be directly employed as building blocks in peptide synthesis.