Sulfinic Acids and Related Compounds 23. Preparation of Sulfinic Acids by the Reaction of Sulfonyl Halides with Thiols
作者:Chew Lee、Lamar Field
DOI:10.1055/s-1990-26884
日期:——
The reaction of arene- and alkanesulfonyl halides with p-thiocresol in the presence of triethylamine at - 76°C gives triethylammonium sulfinates, which after acidification afford sulfinic acids of 95-100% purity in yields of 51-92% for 18 typical representatives. The synthesis succeeds in certain instances where conventional reduction with aqueous sodium sulfite fails and in other instances often is superior. The method is rapid, mild, selective, convenient, and general, although a few limitations are reported. Characterizations of the sulfinic acids are effected by titration with aqueous sodium nitrite, by IR and 1H-NMR spectra, by preparation of either a S-benzylthiuronium salt or a p-nitrobenzyl ester, and either by elemental analyses or comparison with reported melting points of the acids and derivatives as appropriate.
在-76°C下,芳基和烷基磺酰氯与对硫甲酚在三乙胺存在下的反应,生成了三乙铵亚磺酸盐,酸化后得到纯度为95-100%的亚磺酸,对于18个典型代表物的产率为51-92%。在某些情况下,这种合成方法成功地替代了传统的硫酸钠水溶液还原法,并且在其他情况下通常更优。该方法快速、温和、选择性强、方便且具有通用性,尽管也报道了一些局限性。亚磺酸的表征是通过水合亚硝酸钠滴定、红外和氢核磁共振光谱、制备S-苄基硫脲盐或对硝基苄酯,以及元素分析或与报道的酸及其衍生物的熔点进行比较来实现的。