Highly Efficient Curtius Rearrangement Approach for the Synthesis of Unsymmetrical Sulfonimidoyl Ureas

Abstract

AbstractA highly efficient synthesis of unsymmetrical sulfoximine ureas is developed. The reaction unites simple NH‐sulfoximines and acyl azides by a formal Curtius rearrangement as the key step. This reaction could be easily scaled up to gram scale and omits the generation of hazardous byproducts, thus allowing a practical and environmentally benign path for the synthesis of medicinally important sulfonimidoyl unsymmetrical ureas.