Diastereoselective intermolecular ene reactions: synthesis of 4,5,6,7-tetrahydro-1H-benzo[d]imidazoles
作者:Lynsey J. Watson、Ross W. Harrington、William Clegg、Michael J. Hall
DOI:10.1039/c2ob26009c
日期:——
The Diels–Alder cycloadducts of 4-vinylimidazoles and N-phenylmaleimide are shown to undergo facile intermolecular ene reactions. Overall the reaction of three simple molecules (a diene, a dienophile and an enophile) in a two-step process gives 4,5,6,7-tetrahydro-1H-benzo[d]imidazoles with high yields, high atom economy and diastereocontrol of up to 5 new stereocentres.
研究表明,4-乙烯基咪唑和 N-苯基马来酰亚胺的 Diels-Alder 环加载产物可发生简便的分子间烯反应。总体而言,通过三个简单分子(一个二烯、一个亲二烯和一个亲烯)的两步反应,可以得到 4,5,6,7-四氢-1H-苯并[d]咪唑,产量高,原子经济性好,并可非对映地控制多达 5 个新的立体中心。