METABOLIC STUDIES WITH DI(AZIRIDIN-1-YL) SULPHOXIDE (DIETHYLENEIMINOSULPHOXIDE)

Electrophilic Chlorine from Chlorosulfonium Salts: A Highly Chemoselective Reduction of Sulfoxides

Herein, we describe a selective late-stage deoxygenation of sulfoxides based on a novel application of chlorosulfonium salts and demonstrate a new process using these species generated in situ from sulfoxides as the source of electrophilic chlorine. The use of highly nucleophilic 1,3,5-trimethoxybenzene (TMB) as the reducing agent is described for the first time and applied in the deoxygenation of simple and functionalized sulfoxides. The method is easy to handle, economic, suitable for gram-scale operations, and readily applied for poly-functionalized molecules, as demonstrated with more than 45 examples, including commercial medicines and analogues. We also report the results of competition experiments that define the more reactive sulfoxide and we present a mechanistic proposal based on substrate and product observations.

THE EFFECT OF CERTAIN ETHYLENEIMINES ON RENAL FUNCTION

Certain simple derivatives of ethyleneimine cause an intense and prolonged diuresis in nonhydrated rats. Sodium, potassium and chloride excretion is unaffected by these compounds. Ethyleneimine also causes a diuresis in the rat, but the polyfunctional compound thiotepa is ineffective. The relationship between structure and activity of a number of compounds is discussed with particular reference to the possibility that the diuresis is due to the in vivo liberation of ethyleneimine.