Optically Active Aromatic and Heteroaromatic α-Amino Acids by a One-Pot Catalytic Enantioselective Addition of Aromatic and Heteroaromatic C−H Bonds to α-Imino Esters
作者:Steen Saaby、Pau Bayón、Pompiliu S. Aburel、Karl Anker Jørgensen
DOI:10.1021/jo0256787
日期:2002.6.1
procedure for the synthesis of non-natural aromatic and heteroaromatic alpha-amino acids is reported. Starting from readily available starting materials and application of a chiral BINAP-Cu(I) catalyst, the optically active products are formed with readily removable N-protecting groups. The scope of the reaction is demonstrated by the addition of substituted furans, thiophenes, pyrroles, and aromatic compounds
报道了一种用于合成非天然芳族和杂芳族α-氨基酸的实用的一锅催化对映选择性方法的开发。从容易获得的起始原料和手性BINAP-Cu(I)催化剂的应用开始,形成具有易于除去的N-保护基的旋光产物。通过以高收率向N-烷氧基羰基-α-亚氨基酯中添加取代的呋喃,噻吩,吡咯和芳香族化合物来证明反应的范围,对呋喃的对映选择性高达96%ee,对呋喃的对映选择性高达93%ee。噻吩,98%为芳香族化合物。保护基易于除去,并且证明了芳族和杂芳族α-氨基酸的各种转化。