Acta Chimica Sinica ›› 1982, Vol. 40 ›› Issue (12): 1148-1158. Previous Articles     Next Articles

螺旋构象的徽环境效应——6.在二甲基亚砜-水混合溶剂体系中糖淀粉包结作用对对硝基苯酚酯水解的催化效应

惠永正, 王淑静, 蒋锡夔   

  1. 中国科学院上海有机化学研究所
  • 收稿日期:1981-11-16 出版日期:1982-12-15 发布日期:2013-06-03
  • 通讯作者: 惠永正

THE MICROENVIRONMENTAL EFFECTS OF THE HELICAL CONFORMATIONS OF AMYLOSE AND ITS DERIVATIVES 6. CATALYTIC HYDROLYSIS OF ESTERS OF p-NITROPHENOL BOUND BY AMYLOSE IN THE DMSO-H2O MIXED-SOLVENT SYSTEM

HUI YONG-ZHENG, WANG SHU-JING, JIANG XI-KUI   

  1. Shanghai Institute of Organic Chemistry, Academia Sinica
  • Received:1981-11-16 Online:1982-12-15 Published:2013-06-03

Our recent investigations have established that the formation of helical supramolecular complexes of amyloae 1 or its derivatives with long-chain substrates in both aqueous and DMSO=H2O mixed-solvent systems is accompanied by conformational changes of the macromolecules.This paper reports the resalta from an investigation of the hydrolysis of five esters of p-nitrophenol, to wit, the acetate 2,the valerate 3; the caprylate 4, the laurate 6 and the palmitate 6, in the 1:1.V/V DMSO-H2O mixture with amyloae 1 as a catalyat.Two buffers were used, viz.0.01 M sodium borate or sodium bicarbonate; their pH values are 9.5 in pure water.The observed rate constants, kobs, for the hydrolysis of the substrates were determined by monitoring the absorbance at 410 nm.