Sonogashira cross-coupling reactions with heteroaryl halides in the presence of a tetraphosphine–palladium catalyst
作者:Marie Feuerstein、Henri Doucet、Maurice Santelli
DOI:10.1016/j.tetlet.2005.01.044
日期:2005.3
Heteroaryl halides undergoes cross-couplings with alkynes in good yields in the presence of [PdCl(C3H5)]2/cis,cis,cis-1,2,3,4-tetrakis(diphenylphosphinomethyl)cyclopentane as catalyst. A variety of heteroaryl halides such as pyridines, quinolines, a pyrimidine, an indole, a thiophene, or a thiazole have been used successfully. The reaction also tolerates several alkynes such as phenylacetylene and
在[PdCl(C 3 H 5)] 2 /顺式,顺式,顺式-1,2,3,4-四(二苯基膦甲基)环戊烷的存在下,杂芳基卤化物与炔烃进行交叉偶联,收率很高。已经成功地使用了各种杂芳基卤化物,例如吡啶,喹啉,嘧啶,吲哚,噻吩或噻唑。该反应还可以耐受几种炔烃,例如苯乙炔和一系列烷-1-炔醇。此外,该催化剂可在低负荷下与某些底物一起使用。
Substituted tetrahydropyridines and hydroxypiperidines as central
申请人:Warner-Lambert Company
公开号:US05273977A1
公开(公告)日:1993-12-28
Substituted tetrahydropyridines and hydroxypiperidines and derivatives thereof are described, as well as methods for the preparation and pharmaceutical composition of the same, which are useful as central nervous system agents and are particularly useful as dopaminergic, antipsychotic, and antihypertensive agents as well as for treating hyperprolactinaemia-related conditions and central nervous system disorders.
Substituted tetrahydrophyridines and hydroxypiperidines as central
申请人:Warner-Lambert Company
公开号:US05466698A1
公开(公告)日:1995-11-14
Substituted tetrahydropyridines and hydroxypiperidines and derivatives thereof are described, as well as methods for the preparation and pharmaceutical composition of the same, which are useful as central nervous system agents and are particularly useful as dopaminergic, antipsychotic, and antihypertensive agents as well as for treating hyperprolactinaemia-related conditions and central nervous system disorders.
A Sequential Activation of Alkyne and C–H Bonds for the Tandem Cyclization and Annulation of Alkynols and Maleimides through Cooperative Sc(III) and Cp*-Free Co(II) Catalysis
[4 + 2] oxidative Diels–Alder reaction of readily available alkynols with maleimide is achieved for the rapid access of pthalimide-fused multicyclic compounds. The reaction is proposed to go through a sequence of Sc(OTf)3-catalyzed electrophilic cyclization, ligand exchange with Cp*-free cobalt, and C–H activation followed by maleimide insertion.
Substituted piperazines as central nervous system agents
申请人:Warner-Lambert Company
公开号:US05270312A1
公开(公告)日:1993-12-14
Substituted piperazines and derivatives of Formula I ##STR1## are described, as well as methods for the preparation and pharmaceutical composition of the same, which are useful as central nervous system agents and are particularly useful as dopaminergic, antipsychotic, and antihypertensive agents as well as for treating hyperprolactinaemia-related conditions and central nervous system disorders.