Unusual Course of the Reaction of Lawesson’s Reagent with β-Phosphoryl- β’-carbethoxyhydrazones: First Synthesis of 5-Mercapto-3-(methylthiophosphoryl) pyrazoles
作者:Emna Chebil、Soufiane Touil
DOI:10.2174/157017812801264764
日期:2012.5.1
It is well known that Lawesson’s reagent (LR) reacts with hydrazone derivatives at 80 °C to yield 3-thioxo- 1,2,3-diazaphospholine derivatives. We show, in the present investigation, that the reaction of LR with β- phosphoryl-β’-carbethoxyhydrazones under the same conditions, took an entirely different course and gave a new type of pyrazole derivatives, the 5-mercapto-3-(methylthiophosphoryl)pyrazoles
众所周知,Lawesson试剂(LR)在80℃下与衍生物反应以产生3-硫代-1,2,3-二氮杂磷酸衍生物。在本研究中,我们表明,在相同条件下,LR与β-磷酰基-β'-乙氧基hydr肼的反应采用了完全不同的过程,并得到了一种新型的吡唑衍生物,即5-巯基-3-(甲硫基磷酰基)吡唑类。