α-Oxo Ketene Cyclic Dithioacetal Chemistry(Ⅴ)——Synthesis of β,β-1,3-Dithiopropylidene-α,β-unsaturated Aryl Ketones

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (12): 1558.

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α-Oxo Ketene Cyclic Dithioacetal Chemistry(Ⅴ)——Synthesis of β,β-1,3-Dithiopropylidene-α,β-unsaturated Aryl Ketones

YANG Zhi-Yun¹, DONG De-Wen¹, LIU Qun¹, HU Yu-Lan¹, JING Feng-Ying², XIAO Yan-Wen²

1. Department of Chemistry Northeast Normal University, Changchun, 130024;
2. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun

Received:1992-03-15 Revised:1992-09-02 Online:1992-12-24 Published:1992-12-24

Abstract

Abstract: Seven title compounds were synthesized from aryl ketones with active methylene.It is proved that potassium tert-butoxide is an effective base in this procedure.When the proportion of substrate :carbon disulfide :potassium tert-butoxide i 1,3-dibromopropane is 1:1:2:1.0-1.1,the reaction gave the best yield.In the reaction,the proper concentration to potassium tert-butoxide is 0.4-0.6 mol/Land 1,3-dibromopropane is more effective than 1,3-dichloropropane as the halohy-drocarbon.In the products,2_b～2_g are new compounds.

Key words: β,β-1,3-Dithiopropylidene-α,β-unsaturated aryl ketone, Synthesis, Potassium tert-buloxide

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YANG Zhi-Yun, DONG De-Wen, LIU Qun , HU Yu-Lan, JING Feng-Ying, XIAO Yan-Wen. α-Oxo Ketene Cyclic Dithioacetal Chemistry(Ⅴ)——Synthesis of β,β-1,3-Dithiopropylidene-α,β-unsaturated Aryl Ketones[J]. Chem. J. Chinese Universities, 1992, 13(12): 1558.

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α-Oxo Ketene Cyclic Dithioacetal Chemistry(Ⅴ)——Synthesis of β,β-1,3-Dithiopropylidene-α,β-unsaturated Aryl Ketones

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