Application of (S)- and (R)-methyl pyroglutamates as inexpensive, yet highly efficient chiral auxiliaries in the asymmetric Michael addition reactions
作者:Chaozhong Cai、Takeshi Yamada、Rohit Tiwari、Victor J. Hruby、Vadim A. Soloshonok
DOI:10.1016/j.tetlet.2004.07.096
日期:2004.9
N-(E-enoyl)pyroglutamates, derived from inexpensive and readily available in both enantiomeric forms pyroglutamic acid were found to be an efficient Michael acceptors in the addition reactions with nucleophilic glycine equivalent allowing for an efficient practical asymmetric synthesis of β-substituted pyroglutamic acids and related compounds.
N-(E-烯丙基)焦谷氨酸甲酯,源自廉价且容易以两种对映体形式焦谷氨酸得到,在亲核甘氨酸当量的加成反应中是有效的迈克尔受体,可有效地实际不对称合成β-取代的焦谷氨酸。酸和相关化合物。