The reaction of t-butylhypochlorite with different thiocarbonyl compounds has been studied. Primary thioamides give 1,2,4-thiadiazole derivatives. N-Phenylthiourea gives 5-imino-4-phenyl-3-phenylamino-4,5-dihydro-1,2,4-thiadiazoline . Secondary and tertiary thioamides , N-methyl-2-thiopyrrolidinone , N,N' -dicyclohexylthiourea , N,N,N'-tri-methylthiourea , 5-ethyl-5-phenylthiobarbituric acid , xanthione
已经研究了次氯酸叔丁酯与不同的硫代羰基化合物的反应。伯硫代酰胺产生1,2,4-噻二唑衍生物。N-苯基硫脲产生5-亚氨基-4-苯基-3-苯基氨基-4,5-二氢-1,2,4-噻二唑啉。仲和叔硫酰胺,N-甲基-2-硫代吡咯烷酮,N,N'-二环己基硫脲,N,N,N'-三甲基硫脲,5-乙基-5-苯基硫代巴比妥酸,黄酮,米氏酮XXX,硫代香豆素,O- ethylthiobenzoate ,0,0-diphenylthiocarbonate ,二- p -甲苯基和ö亚苯基三硫代碳酸酯和都提供了氧类似物。N,N-二甲基-S-苯基二硫代碳酸酯产生二硫化物,三硫化物和四硫化物的混合物。一种用于转换机制提出了根据ARD和经常的CID和ASES(HSAB)原理。
O,O-Diethyl dithiophosphoric acid mediated direct synthesis of thioamides from aldehydes and ketones
作者:Arvind K. Yadav、Vishnu P. Srivastava、Lal Dhar S. Yadav
DOI:10.1016/j.tetlet.2012.10.089
日期:2012.12
A general and convenient method for a one-pot conversion of aldehydes and ketones into thioamides has been developed. The protocol involves oximation of aldehydes and ketones followed by deoxygenative thioamidation of oximes with O,O-diethyl dithiophosphoric acid which acts as an acid as well a source of sulfur. The method is operationally simple, high yielding, and also applicable to the conversion
A facile and odorless one-pot thionation process for the synthesisof N-substituted thioamides using chemically stable and inexpensivethiourea reagent via the Beckmannrearrangement of ketoximes, hasbeen described.
已经描述了使用化学稳定且廉价的硫脲试剂通过酮肟的贝克曼重排合成 N 取代硫代酰胺的简便且无味的一锅硫化工艺。
Ketoximes to N-substituted thioamides via PSCl3 mediated Beckmann rearrangement
作者:Uma Pathak、Lokesh Kumar Pandey、Sweta Mathur、M. V. S. Suryanarayana
DOI:10.1039/b911844f
日期:——
N-Substituted thioamides were accessed from ketoximes by utilising PSCl3 as a uniquely capable reagent to induce Beckmannrearrangement as well as to capture the intermediate nitrilium ion.