An efficient and convenient palladium-catalyzed direct intermolecular silylation of C(sp2)–H bonds by using disilanes as the silicon source with the assistance of a readily removable bidentate directing group is reported. This strategy provided a regio- and stereoselective protocol for exclusive synthesis of Z-vinylsilanes with reasonable to excellent yields and good functional group compatibility
[EN] TRISUBSTITUTEDSILYLMETHYLPHENOXYQUINOLINES AND ANALOGUES<br/>[FR] SILYLMÉTHYLPHÉNOXYQUINOLÉINES TRISUBSTITUÉS ET ANALOGUES
申请人:BAYER AG
公开号:WO2018202712A1
公开(公告)日:2018-11-08
The present disclosure relates to fungicidal active compounds, more specifically to trisubstitutedsilylmethylphenoxyquinolines and analogues thereof, processes and, intermediates for their 5 preparation and use thereof as fungicidal active compound, particularly in the form of fungicide compositions. The present disclosure also relates to methods for the control of phytopathogenic fungi of plants using these compounds or compositions comprising thereof.
Tuning Vinylethylene Carbonates into [4 + 2] Cycloaddition via Silylation and Vinylogous Peterson Elimination
作者:Wei Feng、Li Xu、Deng-Yuan Li、Pei-Nian Liu
DOI:10.1021/acs.orglett.0c01690
日期:2020.7.2
Vinylethylene carbonates have been extensively used to trigger [3 + n] or [5 + n] cycloaddition via the formation of η3-allylic intermediates, while the important [4 + n] cycloaddition has not been explored yet. Here, we report a new strategy to convert vinylethylene carbonates into 4-(trimethylsilyl)but-2-en-1-ols, which can readily undergo [4 + 2] cycloaddition by in situ formation of 1,3-dienes
碳酸乙烯基亚碳酸盐已经被广泛地用于触发[3 + Ñ ]或[5 + Ñ ]环加成经由的η形成3 -烯丙基中间体,而重要的[4 + Ñ ]环加成尚未探索尚未。在这里,我们报告了一种新的策略,将碳酸乙烯基亚乙酯转化为4-(三甲基甲硅烷基)but-2-en-1-ols,可以通过原位形成1,3-二烯容易地进行[4 + 2]环加成反应。这种新颖的反应包括[Pd II ]催化的脱羧甲硅烷基化,[Fe III ]催化的乙烯基彼得森消除,以及随后的[4 + 2]环加成反应,以提供多取代的环己-1,4-二烯骨架。
Photolysis of 1,1,2,2-tetramethyl-1,2-bis-(2′-thienyl)disilane
作者:Shui-Sheng Hu、William P. Weber
DOI:10.1016/0022-328x(89)88003-9
日期:1989.6
Photolysis of 1,1,2,2-tetramethyl-1,2-bis-(2′-thienyl)disilane (I) in methanol/benzene leads to dimethyl-bis-(2′-thienyl)silane (III), 2-methoxydimethylsilylthiophene (IV) and 2-dimethylsilylthiophene (V) as a major products. The mechanism of this reaction, has been explored by use of methanol-d4. The predominant pathway leading to IV and V appears to involve direct reaction of methanol with the photoexcited