Zhao Yuexia
2009
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Journal
Journal of Shihezi University
Abstract
Synthesis of L-cystein Benzyl Ester p-toluenesulfonate using Lystein as raw mateiral,The optimum synthetic conditions were as follows:n(L-cystein):n(P-tolue nesulfonic acid:n(benzyl alcohol))=1.0∶1.1∶3.7,50mL benzene.Under these conditions L-cystein Benzyl Ester p-toluenesulfonate yield is 86.5%.And then use the L-cystein Benzyl Ester p-toluenesulfonate and aldehydes to form the corresponding thiazolidine-4-carboxylic acid benzyl ester,the yield was 72.3%,the structure of compounds by 1H NMR,IR,elemental analysis to confirm.And then the medicine intermediate of some Angiotensin Converting Enzyme Inbibitors(ACEI),was developed.