Microbial Baeyer−Villiger Oxidation: Stereopreference and Substrate Acceptance of Cyclohexanone Monooxygenase Mutants Prepared by Directed Evolution
作者:Marko D. Mihovilovic、Florian Rudroff、Alexander Winninger、Toni Schneider、Frank Schulz、Manfred T. Reetz
DOI:10.1021/ol0601040
日期:2006.3.1
array of random mutants of cyclohexanonemonooxygenase (CHMO) from Acinetobacter sp. NCIMB 9871 was screened against a library of structurally diverse ketones for modifications in the substrate acceptance profile and stereopreference of the enzymatic Baeyer-Villiger biooxidation. While the set of mutant biocatalysts was initially evolved for the enantiocomplementary oxidation of 4-hydroxycyclohexanone
Compositions containing certain bicyclic lactones and having insect repellent properties are disclosed. Such compositions comprise a compound of the formula:
or the corresponding unsaturated compound thereof having the formula:
wherein R, R', R" and R''' each are lower alkyl or hydrogen; wherein y is an integer from 1-3, and x and z each are 0 or 1, with the proviso that y is 1 or 2 when x is 1; and a carrier. A method of using such a repellent composition to repel an insect from a situs comprises applying to such situs an effective amount of the composition, with or without the carrier, and thereby repelling the insect from the situs.