Preparation of vinylsilane from monosilane and vinyl chloride
摘要:
Vinylsilane (CH2=CH-SiH3) was prepared by the dehydrochlorination reaction between SIH4 and vinyl chloride. The reactions were carried out in the gas phase at 450-500 degrees C using a tube reactor, and the maximum yield of vinylsilane was 21% when the conversion of SIH4 was 32%. A small amount of CCl4 and CH3NO2 accelerated the reaction. A reaction mechanism involving :SiH2, which was generated by the thermal decomposition of SIH4, was proposed. (C) 1999 Elsevier Science S.A. All rights reserved.
Lewis Base Catalyzed Selective Chlorination of Monosilanes
作者:Alexander G. Sturm、Julia I. Schweizer、Lioba Meyer、Tobias Santowski、Norbert Auner、Max C. Holthausen
DOI:10.1002/chem.201803921
日期:2018.12.3
A preparatively facile, highly selective synthesis of bifunctional monosilanes R2SiHCl, RSiHCl2 and RSiH2Cl is reported. By chlorination of R2SiH2 and RSiH3 with concentrated HCl/ether solutions, the stepwise introduction of Si−Cl bonds is readily controlled by temperature and reaction time for a broad range of substrates. In a combined experimental and computational study, we establish a new mode
Silver tetrafluoroborate induced reaction of trimethylsilyl enol ethers with 2,3-diiodo-1-(phenylsulfonyl)-1-propene as a method for preparing substituted furans
作者:Albert Padwa、Masaru Ishida
DOI:10.1016/s0040-4039(00)93526-3
日期:1991.10
Treatment of 2,3-diiodo-1-(phenylsulfonyl)-1-propene (DIP) with various trimethylsilyl enol ethers in the presence of silvertetrafluoroborate gives alkylation products derived from SN2 displacement of the terminal halide. These compounds readily cyclize with base to produce substituted furans.
在四氟硼酸银的存在下,用各种三甲基甲硅烷基烯醇醚处理2,3-二碘-1-(苯磺酰基)-1-丙烯(DIP),得到衍生自末端卤化物的S N 2的烷基化产物。这些化合物容易与碱环化以产生取代的呋喃。
Asymmetric Conjugate Addition of Alkylzirconium Reagents to α,β-Unsaturated Lactones
作者:Eleanor E. Maciver、Rebecca M. Maksymowicz、Nancy Wilkinson、Philippe M. C. Roth、Stephen P. Fletcher
DOI:10.1021/ol501292x
日期:2014.6.20
The asymmetric synthesis of β-substituted lactones by catalytic asymmetric conjugate addition of alkyl groups to α,β-unsaturatedlactones is reported. The method uses alkylzirconium nucleophiles prepared in situ from alkenes and the Schwartz reagent. Enantioselective additions to 6- and 7-membered lactones proceed at rt, tolerate a wide variety of functional groups, and are readily scalable. The method
Studies towards synthesis and Lewis acid catalysed functionalization of 3-(4′-substitutedphenylthio)-azetidin-2-ones
作者:Suvidha Pandey、Aarti Thakur、Reshma、Shamsher S Bari、Renu Thapar
DOI:10.1007/s12039-020-01836-8
日期:2020.12
modification of existing molecules for the synthesis of new compounds having diverse pharmacological activities with broad spectrum activity. Monocyclicβ-lactams are stable to hydrolysis by β-lactamases in comparison to other β-lactams and thus are attractive platform for searching anti-bacterial agents. The discovery of differently substituted 3-alkyl/aryl β-lactams having significant anti-microbial activities
Studies toward the Total Synthesis of Sorangicins: Asymmetric Synthesis of the Key Fragments
作者:Dieter Schinzer、Claudia Schulz、Olga Krug
DOI:10.1055/s-2004-835661
日期:——
Efficient synthesis of the key fragments of the complex antibiotics class of sorangicins (Scheme 1) is described. Starting from simple compounds fragments I, II, and IV can be synthesized. For fragment III we chose an approach via L-glucal.