Access to Deuterated Unnatural α-Amino Acids and Peptides by Photochemical Acyl Radical Addition
作者:Li Liu、Zikun Deng、Kun Xu、Pengxing Jiang、Hongguang Du、Jiajing Tan
DOI:10.1021/acs.orglett.1c01448
日期:2021.7.16
visible-light-enabled, photocatalyst-free conjugate addition reaction of dehydroamino acids is disclosed. Employing 4-acyl-1,4-dihydropyridines as both a radical reservoir and reductant, various β-acyl α-amino acids and their deuterated analogues were obtained in good results. Both late-stage peptide modification and stereoselective synthesis of chiral oxazolidinones are successfully achieved. The protocol is characterized
Asymmetric intermolecular conjugateaddition of α-amino acidderivatives with 4 via memory of chirality has been developed. The reactions proceeded in up to 98% ee with retention of configuration at the newly formed tetrasubstituted carbon center when R = Me. The product (R = Me) was transformed into manzacidin A.