Traceless synthesis of hydantoin by focused microwave irradiation
作者:Ming-Juan Lee、Chung-Ming Sun
DOI:10.1016/j.tetlet.2003.10.123
日期:2004.1
An efficient, microwave-assisted method for the liquid-phase combinatorial synthesis of 1,3-disubstitutedhydantoin has been developed. Chloroacetyl chloride was directly anchored to HO–PEG–OH and subsequently reacted with various primary amines in a microwave cavity. The PEG bound secondary amine coupled with isocyanates and concomitant cyclization–cleavage step occurred in mild basic conditions by
A set of two broadly applicable procedures for the N-arylation of hydantoins is reported. The first one relies on the use of stoichiometric copper(I) oxide under ligand- and base-free conditions and enables a clean regioselective arylation at the N3 nitrogen atom, while the second one is based on the use of catalytic copper(I) iodide and trans-N,N′-dimethylcyclohexane-1,2-diamine and promotes arylation