Pyrothiocarbonates; IV. Synthesis of Potassium<i>O</i>-Alkyl Thiocarbonates and Their Use in the Preparation of Symmetrical and Unsymmetrical Dialkoxycarbonyl Sulfides
作者:Mario A. Palominos、Juan C. Vega
DOI:10.1055/s-1990-27027
日期:——
Alkyl group interchange (transesterification) proceeds on heating a potassium O-alkyl thiocarbonate with an alcohol having an alkyl group different from that of the potassium salt. This transesterific- ation is utilized to prepare potassium O-alkyl thiocarbonates since the direct method by reaction of alkoxide ion with carbonyl sulfide is less efficient. The reaction of potassium O-alkyl thiocarbonates with alkyl carbonochloridates gives symmetrical or unsymmetrical dialkoxycarbonyl sulfides in high yields.
烷基互换(转酯化)在加热钾O-烷基硫代碳酸盐与具有不同于钾盐烷基的醇时进行。这种转酯化作用被用于制备钾O-烷基硫代碳酸盐,因为通过醇盐离子与羰基硫反应的直接方法效率较低。钾O-烷基硫代碳酸盐与烷基碳酰氯反应可高收率地得到对称或非对称二烷氧基羰基硫。