Abstract
2,4,6-Tri-isopropylbenzenesulphonyl hydrazide (TPSH, 3a) undergoes thermal decomposition in d 4-methanol solution at 35°, in the presence of triethylamine, at a rate ca. 380 times that of p-toluenesulphonyl hydrazide ( 2b). 3a has been found to be a convenient and effective hydrogenating agent for azobenzene and a number of olefins in methanol solution at 20° and in boiling ether and tetrahydrofuran solutions. Reductions in ether solution appear to be facilitated by the addition of base. 2,4,6-Trimethylbenzenesulphonyl hydrazide (MSH, 4a) undergoes thermal decomposition at a rate ca. 24 times that of 2b; 4a is also a useful hydrogenating agent.
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