Bulletin of the Chemical Society of Japan p. 1698 - 1702 (1980)
Update date:2022-08-05
Topics:
Takai, Kazuhiko
Hotta, Yuji
Oshima, Koichiro
Nozaki, Hitosi
Treatment of R1COR2 with a suspension prepared from diiodomethane, trimethylaluminium and excess zinc in tetrahydrofuran at room temperature affords olefins R1R2C=CH2 in fair (R1,R2=alkyl) to good (R1=alkyl, R2=H) yields.The ketone methylenation is better carried with another system consisting of CH2Br2-Zn-TiCl4.Ketones and aldehydes are transformed into α-chloro α,β-unsaturated esters or α,β-unsaturated esters in good yields on treatment with methyl trichloroacetate or t-butyl dichloroacetate (ethyl dibromoacetate) in the presence of diethylaluminium chloride and zinc.
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Doi:10.1246/cl.1980.621
(1980)Doi:10.1021/jo01012a067
(1965)Doi:10.1039/b415555f
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(2005)Doi:10.1016/j.jorganchem.2004.09.034
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