Stereoselective hydrolysis of nitriles and amides under mild conditions using a whole cell catalyst
摘要:
An immobilised whole cell Rhodococcus sp. (SP 361) has been shown to be an effective catalyst for the stereoselective hydrolysis of both racemic and prochiral nitrile containing compounds. 2-Alkyl-arylacetonitriles 6a-8a were hydrolysed to (S)-acids and (R)-amides whereas the closely related substrate 9a gave the (R)-acid. A series of prochiral dinitriles 10a-13a were hydrolysed to the corresponding (S)-acids with e.e.'s 22-84%. Models to account for the stereoselectivity of the enzymic hydrolyses have been proposed.
作者:John A. Crosby、Julian S. Parratt、Nicholas J. Turner
DOI:10.1016/s0957-4166(00)86057-7
日期:1992.12
A series of prochiral 3-hydroxyglutaronitrile derivatives 1–5 has been enzymically hydrolysed to the corresponding nitrile-carboxylic acids 1b–5b with enantiomeric excesses ranging from 22–84%. In all cases the products were of the (S)-configuration.
A Stereodivergent Approach to Substituted 4-Hydroxypiperidines
作者:Mandy K. S. Vink、Christien A. Schortinghuis、Jordy Luten、Jan H. van Maarseveen、Hans E. Schoemaker、Henk Hiemstra、Floris P. J. T. Rutjes
DOI:10.1021/jo025943o
日期:2002.11.1
A stereodivergent route toward both diastereomeric forms of functionalized 4-hydroxypiperidines has been successfully developed. This route involves biocatalytic generation of the enantiopure starting materials followed by functionalization via N-acyliminium ion-mediated CC-bond formation.
Crosby John A., Parratt Julian S., Turner Nicholas J., Tetrahedron, 3 (1992) N 12, S 1547-1550
作者:Crosby John A., Parratt Julian S., Turner Nicholas J.
DOI:——
日期:——
Stereoselective hydrolysis of nitriles and amides under mild conditions using a whole cell catalyst
作者:Timothy Beard、Mark A. Cohen、Julian S. Parratt、Nicholas J. Turner、John Crosby、Jock Moilliet
DOI:10.1016/s0957-4166(00)80215-3
日期:1993.6
An immobilised whole cell Rhodococcus sp. (SP 361) has been shown to be an effective catalyst for the stereoselective hydrolysis of both racemic and prochiral nitrile containing compounds. 2-Alkyl-arylacetonitriles 6a-8a were hydrolysed to (S)-acids and (R)-amides whereas the closely related substrate 9a gave the (R)-acid. A series of prochiral dinitriles 10a-13a were hydrolysed to the corresponding (S)-acids with e.e.'s 22-84%. Models to account for the stereoselectivity of the enzymic hydrolyses have been proposed.
Microbial Hydrolysis of 3-Substituted Glutaronitriles
Rhodococcus butanica ATCC 21197 preferentially hydrolyzed pro-S cyano group of 3-substituted glutaronitriles with an aromatic ring. A product with high e.e. (>99%) was obtained from 3-benzoyloxy derivative.