Fluorinated (hetero)cycles via ring-closing metathesis of fluoride- and trifluoromethyl-functionalized olefins
摘要:
Ring-closing metathesis(RCM) has been shown to be a viable tool to incorporate fluoride and trifluoromethyl substituents in (hetero)cyclic ring systems. 2-Fluoroacrylamides were cyclized to the corresponding lactams, and trifluoromethyl- substituted olefins were cyclized to yield trifluoromethylated cyclopentenes, pyrrolines and a dihydrofuran derivative. (C) 2003 Elsevier Ltd. All rights reserved.
The invention provides a compound of formula I:
or a pharmaceutically acceptable salt thereof, wherein the variables X, Y
1
-Y
5
, R
1
, R
2
, R
3
, R
4
, and Het have the meaning as described herein, and compositions containing such compounds and methods for using such compounds and compositions.
An Improved Ring-Closing Metathesis Approach to Fluorinated and Trifluoromethylated Nitrogen Heterocycles
作者:Valeria De Matteis、Olivier Dufay、Dennis C. J. Waalboer、Floris L. van Delft、Jörg Tiebes、Floris P. J. T. Rutjes
DOI:10.1002/ejoc.200601119
日期:2007.6
The synthesis of fluoro- and trifluoromethyl-containing N-sulfonylated nitrogen heterocycles is described. A first crucial step is a Mitsunobu functionalization of intermediate sulfonamides using commercially available unsaturated alcohols, which gives efficient access to fluorinated ring-closingmetathesis (RCM) precursors. Key step is an RCM reaction of these precursors leading to the corresponding
Catalytic enantioselective intramolecular 1,3-dipolar cycloaddition of azomethine ylides with fluorinated dipolarophiles
作者:Christian Cristóbal、Daniel Gaviña、Inés Alonso、María Ribagorda、Juan C. Carretero、Carlos del Pozo、Javier Adrio
DOI:10.1039/d2cc02902b
日期:——
An enantioselective synthesis of polycyclic fluorinated pyrrolidines has been achieved by Cu-catalyzed intramolecular 1,3-dipolarcycloaddition of azomethine ylides with fluorinated dipolarophiles. The method displays a wide scope and afforded the desired cycloadducts in high yields with up to 99% ee. These results demonstrate that fluoroalkyl substituents are excellent activating groups in this transformation
多环氟化吡咯烷的对映选择性合成是通过铜催化的偶氮亚甲基叶立德与氟化偶极体的分子内 1,3-偶极环加成反应实现的。该方法显示范围广,并以高达 99% 的 ee 高产率提供了所需的环加合物。这些结果表明,氟烷基取代基是这种转化中极好的活化基团。
RCM-Mediated Synthesis of Trifluoromethyl-Containing Nitrogen Heterocycles
作者:Valeria De Matteis、Floris L. van Delft、Harald Jakobi、Stephen Lindell、Jörg Tiebes、Floris P. J. T. Rutjes
DOI:10.1021/jo060893z
日期:2006.9.1
A ring-closing metathesis mediated pathway to trifluoromethyl-containing piperidines is detailed. This involves the development of a synthetic route to a new (trifluoromethyl)allylating reagent via a Diels-Alder/retro-Diels-Alder strategy, its application in the synthesis of a series of trifluormethyl-substituted diolefin precursors for ring-closing metathesis, and eventually the successful cyclization of these precursor molecules into the corresponding functionalized piperidines.
NEW ISOXAZOLYL ETHER DERIVATIVES AS GABA A ALPHA5 PAM
申请人:Hoffmann-La Roche Inc.
公开号:US20210094945A1
公开(公告)日:2021-04-01
The invention provides novel compounds having the general formula (I) or (II)
wherein R
2
, R
3
, R
5
, R
99
, W, Y and Z are as described herein, compositions including the compounds and methods of using the compounds.