Regio- and enantioselectivity of the Candida antarctica lipase catalyzed amidations of Cbz-l- and Cbz-d-glutamic acid diesters
摘要:
Candida antarctica lipase (CAL) catalyzed amidation of Cbz-glutamic acid diesters takes place in a regioselective way to give the corresponding monoamide derivatives. The regioselectivity was found to be dependent on the reacting Glu enantiomer. Thus, amidations of Cbz-L-Glu diesters regiospecifically afforded alpha-amide while the gamma-ester is selectively substituted in the D-enantiomer. This enzymatic reaction also shows enantioselectivity when a chiral amine is used as nucleophile.
Regio- and enantioselectivity of the Candida antarctica lipase catalyzed amidations of Cbz-l- and Cbz-d-glutamic acid diesters
摘要:
Candida antarctica lipase (CAL) catalyzed amidation of Cbz-glutamic acid diesters takes place in a regioselective way to give the corresponding monoamide derivatives. The regioselectivity was found to be dependent on the reacting Glu enantiomer. Thus, amidations of Cbz-L-Glu diesters regiospecifically afforded alpha-amide while the gamma-ester is selectively substituted in the D-enantiomer. This enzymatic reaction also shows enantioselectivity when a chiral amine is used as nucleophile.