Highly Enantioselective Synthesis of Arylaliphatic Tertiary Alcohols using Mutants of an Esterase fromBacillus subtilis
作者:Robert Kourist、Sebastian Bartsch、Uwe T. Bornscheuer
DOI:10.1002/adsc.200600641
日期:2007.6.4
kinetic resolution of a series of acetates of arylaliphatictertiaryalcohols was studied using recombinant esterase variants from Bacillus subtilis (BS2) expressed in E. coli. Highest enantioselectivities (E>100) were achieved in the synthesis of 1,1,1-trifluoro-2-phenylbut-3-yn-2-ol and three para-substituted analogues using BS2 mutant G105A. With mutant E188D only two compounds were converted with
Multicyclic amino acid derivatives and methods of their use
申请人:Devasagayaraj Arokiasamy
公开号:US20070191370A1
公开(公告)日:2007-08-16
Compounds of formulae I and II are disclosed, as well as compositions comprising them and methods of their use to treat, prevent and manage serotonin-mediated diseases and disorders:
Enantioselective synthesis of benzazepinoindoles bearing trifluoromethylated quaternary stereocenters catalyzed by chiral spirocyclic phosphoric acids
作者:Xuejian Li、Di Chen、Haorui Gu、Xufeng Lin
DOI:10.1039/c4cc02295e
日期:——
SPA-catalyzed iso-Pictet–Spengler reaction of C-2-linked o-aminobenzylindoles and trifluoromethyl ketones for construction of optically enriched benzazepinoindole derivatives has been realised.
Bianthryl-based organocatalysts for the asymmetric Henry reaction of fluoroketones
作者:Jan Otevrel、David Svestka、Pavel Bobal
DOI:10.1039/c9ob00884e
日期:——
catalytic system based on bianthrylbis(thiourea) for the asymmetric Henry reaction of fluoroketones and nitroalkanes that resulted from the screening of a library containing 31 chiral non-racemic organocatalysts. The corresponding adducts were isolated in up to 6 times shorter reaction time in comparison with the previously published organocatalysts. High levels of stereocontrol have been generally observed
Cascade reaction for the construction of CF<sub>3</sub> containing tetrasubstituted furan ring
作者:Manoj K. Choudhary、Venkata Subba Rao Ganga、Tusharkumar Menapara、Rukhsana I. Kureshy、Noor-ul H. Khan、Sayed H. R. Abdi、Eringathodi Suresh
DOI:10.1039/c6ra19782e
日期:——
but proton abstraction from the substituted α-methyl group in nitroolefin is rare. We report the first DBU-catalysed one-pot reaction of TFMK and activated nitroolefin followed by intramolecular cyclization reaction, to construct stereogenic center containing a furan core with CF3 in excellent yields (up to >95%).