Pd-catalyzed reductive cleavage of alkyl aryl sulfides with triethylsilane that is accelerated by trialkylsilyl chloride
摘要:
The palladium-catalyzed reductive cleavage of alkyl aryl sulfides to afford the corresponding arenes in high yield, which is both accelerated and exhibits increased functional group selectivity in the presence of TMSCI, is described. This ligand-free reaction features mild conditions, easy operation, use of readily available reagents, and high functional group selectivity. (c) 2012 Elsevier Ltd. All rights reserved.
The catalytic C–H silylation of sulfides with hydrosilanes is of much interest and importance but has remained unexplored to date. We report here the C–H silylation of methylsulfides with hydrosilanes by an yttrium metallocene catalyst. The reaction took place regioselectively at the α-methyl C–H bond, affording the corresponding silylated sulfide derivatives that are difficult to make by other means
The synthesis of a range of 2′-, 3′- and 4′-substituted 3-nitro-4-bromobiphenyls and of their intermediates is described.
描述了一系列2'-,3'-和4'-取代的3-硝基-4-溴代二苯及其中间体的合成。
Pd‐Catalyzed Synthesis of Biphenyls with Methylthio Group
作者:Zhiqiang Zhang、Zhizhi Hu、Zhixiao Yu、Haijun Chi、Peng Lei、Yue Wang、Ren He
DOI:10.1080/00397910601131049
日期:2007.3
Abstract The synthesis of unsymmetrical biaryls with a methylthiogroup is achieved using the air‐stable palladium–phosphinous acid complexes, [(t‐Bu)2P(OH)]2 PdCl2 (POPd), as the catalyst. A great variety of substituted bromobenzenes having electron‐withdrawing and electron‐donating functional groups in para and meta positions have been successfully coupled with 3‐methylthiophenylboronic acid.
The present invention provides compounds of formula (I) wherein R1, A1, X, Y6, Y7, Y8, G1, G2, G3 and p are as defined in the claims. The invention further provides intermediates used in the preparation of these compounds, to compositions which comprise these compounds and to their use in agriculture or horticulture for controlling or preventing infestation of plants by phytopathogenic microorganisms, preferably fungi.
3-ARYLPHENYL SULFIDE DERIVATIVE AND INSECTICIDE AND MITICIDE
申请人:Toriyabe Keiji
公开号:US20050107383A1
公开(公告)日:2005-05-19
3-Arylphenyl sulfide derivatives represented by general formula (I):
(wherein R is a C
2
-C
6
alkyl group, a C
2
-C
6
alkenyl group, a C
2
-C
6
alkynyl group or the like, B
0
to B
2
and B
3
are hydrogen atoms, halogen atoms, cyano groups, C
1
-C
4
haloalkyl groups or the like, n is 0, 1 or 2, and Ar is a phenyl ring, a pyridine ring, a thiophene ring, a pyrazole ring or the like), and insecticides and miticides containing the 3-arylphenyl sulfide derivatives as an active ingredient.