Microbial hydroxylation of 2-cycloalkylbenoxazoles. Part II. Determination of product structures and enhancement of enantiomeric excess
摘要:
The determinations of product structures obtained in the microbial hydroxylations of various 2-cycloalkyl-1, 3-benzoxazoles using Cunninghamella blakesleeana DSM 1906 and Bacillus megaterium DSM 32 are described. The initially low e.e. of 3-(benz-1, 3-oxazol-2-yl)cyclopentan-1-ol 6, 2-(benz-1, 3-oxazol-2-yl)cyclohexan-1-ol 14 and 4-(2-bent-1, 3-oxazol-2-yl)cycloheptan-1-ol 21 can be enhanced to 98% using lipase catalyzed resolution.
general alkylation of heterocycles using a simple palladium catalyst is reported. Most classes of heterocycles, including indoles and pyridines, efficiently coupled with unactivated secondary and tertiary alkylhalides. An alkyl radical addition to neutral heteroarenes is most likely involved.
This invention relates to modified hydroxylases. The invention further relates to cells expressing such modified hydroxylases and methods of producing hydroxylated alkanes by contacting a suitable substrate with such cells.
Copper-Catalyzed Alkylation of Benzoxazoles with Secondary Alkyl Halides
作者:Peng Ren、Isuf Salihu、Rosario Scopelliti、Xile Hu
DOI:10.1021/ol300348w
日期:2012.4.6
Copper-catalyzed direct alkylation of benzoxazoles using nonactivated secondary alkylhalides has been developed. The best catalyst is a new copper(I) complex (1), and the reactions are promoted by bis[2-(N,N-dimethylamino)ethyl] ether.
[EN] TRICARBONYL COMPLEXES OF TRANSITION METALS WITH BENZO-HETEROCYCLIC DERIVATIVES OF THE CYCLOPENTADIENYL ANION<br/>[FR] COMPLEXES DE TRICARBONYLÉS DE MÉTAUX DE TRANSITION ET DE DÉRIVÉS BENZO-HÉTÉROCYCLIQUES DE L'ANION CYCLOPENTADIÉNYLE
申请人:NATIONAL CENTRE FOR SCIENT RESEARCH DEMOKRITOS
公开号:WO2019180200A1
公开(公告)日:2019-09-26
Complex compounds of transition metals according to formula (1) wherein the M(CO)3 + tricarbonyl-metal core forms a complex with the cyclopentadienyl anion linked to heterocyclic moieties of the benzothiazole, benzimidazole and benzoxazole families. The compounds exhibit high blood-brain barrier permeability and can be used in the diagnosis and/or treatment of diseases of the Central Nervous System.