有机化学 ›› 1990, Vol. 10 ›› Issue (5): 422-426. 上一篇    下一篇

研究论文

相转移催化α-对甲苯磺酰基乙酸酯Hichael加成

张正;刘广鉴;王玉良;许从应;胡良彬   

  1. 南京大学化学系
  • 发布日期:1990-10-25

A facile phase transfer catalyzed-michael addition of ethyl α (P-tolylsulfonyl)acetate to α(P-tolylsulfonyl)acetate to α,β-unsaturated esters

ZHANG ZHENG;LIU GUANGJIAN;WANG YULIANG;XU CONGYING;HU LIANGBIN   

  • Published:1990-10-25

本文报道在固一液相转移催化剂条件下, 于30-40℃用碳酸钾处理α-芳磺酰基乙酯酯, 生成碳负离子, 与α,β-不饱和酯的共轭加成反应, 并轭要讨论催化剂,Michael接受体的结构, 溶剂等因素对该反应的影响。

关键词: 红外分光光度法, 加成反应, 元素分析, 对甲苯磺酸 P, 碳酸钾, 质子磁共振谱法, 相转移催化, 戊二酸 P, 二乙酯, 对甲苯磺酸 P

The facile solid-liq. phase transfer catalyzed-Michael addition of Et a-(p-tolylsulfonyl)acetate (I) to a, b-unsatd. esters is reported. Effects of the catalyst, the Michael receptor and solvent on the conjugate addition are briefly discussed. The sulfur-contg. carbanion was generated from I with potassium carbonate under PTC conditions and then allowed to react in situ with the a,b-unsatd. esters at the temps. of 30-40癈. The Michael addition of the carbanion to acrylates, a-alkylacrylates, itaconates, crotonate, and maleate proceeded smoothly. Eight substituted pentanedioic acid esters, such as 1-ethyl-5-butyl-2-(p-tolylsulfonyl)glutarate, and two substituted hexanedioic acid esters, such as di-Et 2-(p-tolylsulfonyl)-4-ethoxycarbonyladipate, have been synthesized in good to excellent yields. The present procedure provides a mild and convenient method for the synthesis of a various substituted hexanedioic acid esters and pentanedioic acid esters. Some of the a-arylsulfonylglutarates might serve as the intermediates for preparing substituted glutaconates which are synthetically useful, and usually difficult to obtain.

Key words: ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY, POTASSIUM CARBONATE, ADDITION REACTION, P-METHYLBENZENESULFONIC ACID P, PROTON MAGNETIC RESONANCE SPECTROMETRY, PHASE TRANSFER CATALYSIS, DIETHYL ESTER, PENTANEDIOIC ACID P, P-METHYLBENZENESULFONIC ACID P

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