Chemoenzymatic synthesis of enantioenriched 5-oxo-tetrahydro-3-furancarboxylic acid derivatives
作者:Andrea Comini、Cristina Forzato、Patrizia Nitti、Giuliana Pitacco、Ennio Valentin
DOI:10.1016/j.tetasy.2004.01.001
日期:2004.2
(R)-(+)-Paraconic acid 4, (S)-(−)-terebic acid 6 and their corresponding methyl and ethyl esters having ee’s ranging from 60% to 92% were obtained by enzymatic resolution of their racemates. The enzymatic resolution of racemic ethyl γ-methylparaconates 14a and 14b allowed the isolation of the unreacted ester (2R,3R)-(+)-14a and that of the lactonic acid (2S,3R)-(−)-5b with 80% and 93% ee, respectively
通过消旋的外消旋物,获得(ee)范围为60%至92%的(R)-(+)-对ac酸4,(S)-(-)-对苯二甲酸6及其相应的甲酯和乙酯。外消旋的γ-甲基对羟基苯甲酸乙酯14a和14b的酶解可分离未反应的酯(2 R,3 R)-(+)- 14a和内酯酸(2 S,3 R)-(-)- 5b的ee分别为80%和93%ee,前者使用马肝丙酮粉(HLAP),后者使用α-胰凝乳蛋白酶(α-CT)。对映体乙基(2通过面包酵母的乙酰丁二酸二乙酯的还原反应,获得了ee> 99%的S,3 S)-(-)- 14a和(2 S,3 R)-(-)- 14b。