[DE] CHROMANOL-DERIVATE, EIN VERFAHREN ZU IHRER HERSTELLUNG UND IHRE VERWENDUNG ALS ENTZÜNDUNGSHEMMER [EN] CHROMANOL DERIVATIVES, METHOD FOR THE PRODUCTION THEREOF, AND USE THEREOF AS AN ANTI-INFLAMMATORY DRUG [FR] DÉRIVÉS DE CHROMANOL, PROCÉDÉ DE PRÉPARATION DE CES DÉRIVÉS ET LEUR UTILISATION EN TANT QU'ANTI-INFLAMMATOIRES
Trisubstituted 2-Trifluoromethyl Pyrrolidines via Catalytic Asymmetric Michael Addition/Reductive Cyclization
作者:Michael T. Corbett、Qihai Xu、Jeffrey S. Johnson
DOI:10.1021/ol500679w
日期:2014.5.2
2-trifluoromethyl pyrrolidines by asymmetric Michaeladdition/hydrogenative cyclization is described. The direct organocatalytic addition of 1,1,1-trifluoromethylketones to nitroolefins proceeds under mild reaction conditions and low catalyst loadings to provide Michael adducts in high yield with excellent diastereo- and enantioselectivity. Catalytic hydrogenation of the Michael adducts stereoselectively generates
Trifluoromethyl Oxetanes: Synthesis and Evaluation as a <i>tert</i>
-Butyl Isostere
作者:Paramita Mukherjee、Martin Pettersson、Jason K. Dutra、Longfei Xie、Christopher W. am Ende
DOI:10.1002/cmdc.201700333
日期:2017.10.9
The synthesis of a new trifluoromethyl oxetane was developed using a Corey–Chaykovsky epoxidation/ring‐expansion reaction of trifluoromethyl ketones. The reaction was shown to proceed under mild conditions and displays a broad substrate scope. The trifluoromethyl oxetane was also evaluated as a tert‐butyl isostere in the context of the γ‐secretase modulator (GSM) program. We demonstrate that the trifluoromethyl