Cross‐Electrophile Coupling between Aryl/Vinyl Triflates and Vinyl Tosylates for the Synthesis of
<i>gem</i>
‐Difluoroalkenes via Ni/Pd Cooperative Catalysis
作者:Baojian Xiong、Yue Li、Jinyu Zhang、Jiangjun Liu、Xuemei Zhang、Zhong Lian
DOI:10.1002/adsc.202101388
日期:2022.3
A dual nickel-/palladium-catalyzed direct gem-difluorovinylation of readily available aryl/vinyltriflates with substituted gem-difluorovinyl tosylates is presented. This protocol affords various diaryldifluoroalkene, arylalkyldifluoroalkene and 1,1-difluoro-2-substituted-1,3-dienes under mild reaction conditions with excellent functional group compatibility, and provides a potential pathway to the
A process is described for preparing trifluoromethyl ketones of the formula I ##STR1## where R has the given meanings, wherein an alcohol of the formula II ##STR2## is reacted with a compound of the formula IV YO.sub.n H (IV) where n has the given meaning.
Rh-Catalyzed Coupling Reactions of Fluoroalkyl <i>N</i>-Sulfonylhydrazones with Azides Leading to α-Trifluoroethylated Imines
作者:Zhongxue Fang、Yanmei Gong、Binbin Liu、Jin Zhang、Xinyue Han、Zhaohong Liu、Yongquan Ning
DOI:10.1021/acs.orglett.2c03773
日期:2022.12.9
Herein we describe the pioneering Rh-catalyzed coupling reactions of a fluoroalkyl carbene with azides to access α-trifluoroethylated imines, where fluoroalkyl N-sulfonylhydrazones are used as fluoroalkyl diazo surrogates. Remarkably, using TMSN3 as the N source, two C–N bond formation products were obtained. Furthermore, the α-trifluoroethylated imine products could be easily reduced to the corresponding
Cross‐Electrophile Coupling between Two Different Tosylates Enabled by Nickel/Palladium Cooperative Catalysis
作者:Ruiling Qu、Jinyu Zhang、Zhong Lian
DOI:10.1002/ejoc.202300874
日期:2023.10.21
A cross-electrophile coupling reaction of gem-difluoroalkenyl tosylate with α-CF3 benzyl tosylate is presented. This protocol is the first example of cross-electrophile coupling between twodifferent tosylates by Pd/Ni cooperative catalysis.
The present invention provides a compound having a PDE2A selective inhibitory action, which is useful as an agent for the prophylaxis or treatment of schizophrenia, Alzheimer's disease and the like.
The present invention is a compound represented by the formula (1):
wherein each symbol is as described in the specification, or a salt thereof.