Preparation of New<i>O</i>-Alkyl Naphthalenecarbothioates and Alkyl Naphthalenecarbodithioates, and EPR-Spectroscopic Study of Their Radical Anions<sup>,</sup>
作者:Jürgen Voss、Karsten Strey、Thomas Maibom、Manfred Krasmann、Gunadi Adiwidjaja
DOI:10.1080/10426507.2010.490151
日期:2010.5.27
reaction of the corresponding esters by use of Lawesson's reagent. The related naphthalenecarbodithioates are obtained (a) from methylnaphthalenes via bromination with NBS, subsequent methoxide-promoted reaction with sulfur, and finally alkylation of the carbodithioate salts with alkyl halides or (b) lithiation of bromonaphthalenes, reaction with carbon disulfide, and alkylation. The thiono- and dithioesters
O-烷基萘碳硫酸酯和双-硫代碳酸酯是通过使用劳森试剂使相应的酯反应来制备的。相关的萘碳二硫代烃可通过 (a) 甲基萘通过 NBS 溴化,随后与硫进行甲醇促进反应,最后与卤代烷或 (b) 溴代萘的锂化,与二硫化碳反应和烷基化而获得。通过原位电还原将硫代和二硫酯转化为持久性自由基阴离子。自旋密度分布由 EPR 光谱和 MO 计算确定。