The Chemistry of α-Oxo Ketene Cyclic Dithioacetals(Ⅷ) ——Studies on the Synthesis of Aliphatic α-Oxo Ketene Cyclic Dithioacetals with Potassium tert-Butoxide as Base

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (8): 1100.

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The Chemistry of α-Oxo Ketene Cyclic Dithioacetals(Ⅷ) ——Studies on the Synthesis of Aliphatic α-Oxo Ketene Cyclic Dithioacetals with Potassium tert-Butoxide as Base

LIU Qun, ZHU Zai-Ming, YANG Zhi-Yun, XU Bai-Ling, ZHAO Hong-Wu

Department of Chemistry, Northeast Normal University, Changchun, 130024

Received:1992-10-30 Revised:1993-04-29 Online:1993-08-24 Published:1993-08-24

Abstract

Abstract: Ten title compounds were synthesized starting from aliphatic ketones with potassium tert-butoxide as the base.The yields are strongly dependent on the concentration of the base and solvents used.Lower concentration is favorable to raising the yields.When the concentration of the base was 0.4 mol/L, the best yield was obtained.The solvent mixed with benzene and DMFfavored the increase of the yields of products with cyclic ketones as the substrates.For the IRspectra, the carbonyl absorptions of compounds 1 are normally lower than 1647 cm^-1.This might result from the strong conjugation in compound 1.Among the products, 1_d-1_j are new compounds.

Key words: Aliphatic a-oxo ketene cyclic dithioacetals, Potassium tert-butoxide, Synthesis

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LIU Qun, ZHU Zai-Ming, YANG Zhi-Yun, XU Bai-Ling, ZHAO Hong-Wu . The Chemistry of α-Oxo Ketene Cyclic Dithioacetals(Ⅷ) ——Studies on the Synthesis of Aliphatic α-Oxo Ketene Cyclic Dithioacetals with Potassium tert-Butoxide as Base[J]. Chem. J. Chinese Universities, 1993, 14(8): 1100.

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The Chemistry of α-Oxo Ketene Cyclic Dithioacetals(Ⅷ) ——Studies on the Synthesis of Aliphatic α-Oxo Ketene Cyclic Dithioacetals with Potassium tert-Butoxide as Base

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