title: Utilizing hydrolases of opposite enantiopreference for the preparation of both enantiomers of (1R,7aR)-(-)- and (1S,7aS)-(+)-3,6,7,7a-tetrahydro-1-hydroxy-7a-methyl-1H-inden-5(2H)-one.
abstract: Four racemic esters of (1R*,7aR*)-3,6,7,7a-tetrahydro-1-hydroxy-7a-methyl-1H-inden-5(2H)-one were prepared and subjected to hydrolysis with two types of hydrolases, including alcalase and three lipases. Alcalase and lipase showed opposite enantiopreference on these esters. Based on this result, we developed a gram-scale procedure using butanoate as the substrate, which was treated consecutively with alcalase and lipase from Candida rugosa (CRL), to give both enantiomers of the title compound in high yields and high enantiomeric excess.
authors.affiliation: Department of Chemistry, National Taiwan University, Taipei, Taiwan. lclo@ccms.ntu.edu.tw
authors.forename: Lee-Chiang
authors.initials: LC
authors.lastname: Lo
authors.forename: Tzyy-Chao
authors.initials: TC
authors.lastname: Chou
authors.forename: Jung-Jing
authors.initials: JJ
authors.lastname: Shie
mesh_terms: D002175:Candida / Q000201:enzymology; D007192:Indenes / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification*; D008049:Lipase / Q000378:metabolism; D013237:Stereoisomerism; D013379:Substrate Specificity; D013381:Subtilisins / Q000378:metabolism
chemical_list: D007192:Indenes; D008049:Lipase; D013381:Subtilisins