Treatment of trimethylstyrylsilanes with 1-ethoxy-1-(phenylthio)ethane or 2-ethoxy-1,3-dithiolane in the presence of Lewis acid gives the corresponding (E)-allyl sulfide or (E)-2-styryl-1,3-dithiolane, respectively. In both cases, a carbon-oxygen bond of thioacetal derivatives is cleaved selectively.
Synthesis of Dithioacetals and Oxathioacetals with Chiral Auxiliaries
作者:Javid H. Zaidi、Fazal Naeem、Khalid M. Khan、Rashid Iqbal、Zia‐Ullah
DOI:10.1081/scc-200025627
日期:2004.1.1
Abstract One‐pot synthesis of dithioacetals as well as an efficient method for oxathioacetal is reported. Additionally, some chiral auxiliaries were used to synthesize enantiomerically pure dithioacetals and oxathioacetals.
Catalyst-Dependent Selective Synthesis of O/S- and S/S-Acetals from Enol Ethers
作者:Antonio L. Braga、Claudio C. Silveira、Luciano Dornelles、Gilson Zeni、Flavia A. D. Galarza、Ludger A. Wessjohann
DOI:10.1080/00397919508015466
日期:1995.10
Abstract Enol ethers are reacted with mercaptanes to give the corresponding O/S- or S/S-acetals in medium to high yield. Either product can be formed selectively depending on the acid catalyst and the reaction time applied.
Lewis Acid Mediated Selective Chalcogenalkylation of Silyl Enol Ethers with [O,S]-Acetals
作者:Antonio L. Braga、Luciano Dornelles、Claudio C. Silveira、Ludger A. Wessjohann
DOI:10.1055/s-1999-3429
日期:1999.4
Silyl enol ethers of ketones were selectively alkylated with [O,S]-acetals mediated by Lewis acid in a Mukaiyama type Aldol reaction. The products were β-alkoxy- and /or β-sulfanyl carbonyl compounds depending on the catalyst employed.
Visible-Light-Induced Direct Thiolation at α-C(sp<sup>3</sup>)–H of Ethers with Disulfides Using Acridine Red as Photocatalyst
作者:Xianjin Zhu、Xiaoyu Xie、Pinhua Li、Jianqi Guo、Lei Wang
DOI:10.1021/acs.orglett.6b00304
日期:2016.4.1
α-arylthioethers through a visible-light-induced direct thiolation at α-C(sp3)–H of ethers with diaryldisulfides was developed using acridine red as a novel photocatalyst. The reactions occurred at ambient conditions and generated the corresponding products in good to excellent yields, ignoring steric effect of disulfides.