A New Multicomponent Reaction Catalyzed by a [Lewis Acid]<sup>+</sup>[Co(CO)<sub>4</sub>]<sup>-</sup> Catalyst: Stereospecific Synthesis of 1,3-Oxazinane-2,4-diones from Epoxides, Isocyanates, and CO
作者:Tamara L. Church、Christopher M. Byrne、Emil B. Lobkovsky、Geoffrey W. Coates
DOI:10.1021/ja069065d
日期:2007.7.1
catalytic multicomponent reaction is described. The complex [(salph)Al(THF)2]+[Co(CO)4]- (1, salph = N,N'-o-phenylenebis(3,5-di-tert-butylsalicylideneimine), THF = tetrahydrofuran), which is known to carbonylate epoxides, aziridines, and beta-lactones, was used to catalyze the synthesis of 1,3-oxazinane-2,4-diones from epoxides, isocyanates, and CO. Under optimized conditions, the reaction was both selective
描述了使用机械信息开发新的催化多组分反应。络合物[(salph)Al(THF)2]+[Co(CO)4]- (1,salph = N,N'-o-亚苯基双(3,5-二叔丁基水杨亚胺),THF = 四氢呋喃)已知可将环氧化物、氮丙啶和 β-内酯羰基化,用于催化由环氧化物、异氰酸酯和 CO 合成 1,3-恶嗪烷-2,4-二酮。在优化条件下,该反应具有选择性和高产。1,3-氧嗪烷-2,4-二酮由多种环氧化物和异氰酸酯合成,包括一些不进行简单扩环羰基化的环氧化物。最好的结果是使用高度亲电子的异氰酸酯获得的。使用标记和立体化学研究了多组分反应的机理,