Synthesis and Application of Enantioenriched Functionalized α-Tetrasubstituted α-Amino Acids from Biocatalytic Desymmetrization of Prochiral α-Aminomalonamides
作者:Li-Bing Zhang、De-Xian Wang、Liang Zhao、Mei-Xiang Wang
DOI:10.1021/jo3007122
日期:2012.7.6
efficient and enantioselective hydrolytic desymmetrization to afford functionalized α-tetrasubstituted α-amino acids in 74–98% chemical yields and 94.0 to >99.5% ee. The presence of a free α-amino (NH2) substituent in the substrates was deemed important to ensure high biocatalytic efficiency and enantioselectivity. The synthetic application of biocatalytic desymmetrization was demonstrated by practical chemical
通过催化红串红球菌AJ270,一个在中性磷酸盐缓冲液的微生物全细胞催化剂在30℃下,一些前手性α取代的α-aminomalonamides的含酰胺酶进行高效和对映选择性水解desymmetrization,得到官能化α四取代α氨基酸化学产率为74–98%,ee为94.0至> 99.5%。底物中存在游离的α-氨基(NH 2)取代基被认为对于确保高生物催化效率和对映选择性很重要。通过(R)-2-氨基-2-氨基甲酰基戊-4-烯酸的实际化学转化为α-取代的丝氨酸类似物和生物活性的二氨基醇衍生物,证明了生物催化去对称化的合成应用。