Thioacetals are selectively transformed into two types of terminal olefins, one with one-carbon homologation and the other with two-carbon homologation, by treatment with a titanocene(II) species under ethylene. The mode of the reaction is controlled by changing the ligands coordinated to titanocene(II).
Cp<sub>2</sub>TiCl<sub>2</sub>-Catalyzed Regio- and Chemoselective One-Step Synthesis of γ-Substituted Allylsilanes from Terminal Alkenes Using Dianion-Type Zincate (SiSiNOL-Zn-ate)
A regio-/chemoselective silylation reaction of various functionalized terminal alkenes in the presence of titanocene dichloride, based on a newly designed dianion-type zincate, was developed. The present silylation of terminal alkenes is a powerful tool for the one-pot generation of regiocontrolled functionalized allysilanes, which are available for various transformation reactions, such as hydroxyalkylation, epoxidation, and hydroboration.
Katritzky, Alan R.; Luo, Zhushou; Fang, Yunfeng, Journal of the Chemical Society. Perkin Transactions 2 (2001), 2000, # 7, p. 1375 - 1380
作者:Katritzky, Alan R.、Luo, Zhushou、Fang, Yunfeng、Feng, Daming、Ghiviriga, Ion
DOI:——
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Henry James R., Weinreb Steven M., J. Org. Chem., 58 (1993) N 17, S 4745
作者:Henry James R., Weinreb Steven M.
DOI:——
日期:——
A convenient, mild method for oxidative cleavage of alkenes with Jones reagent/osmium tetraoxide