Diastereoselective Diels-Alder reactions of nonracemic 3- and 4-amino furans bound to polystyrene. A comparison of these reactions to their solution state analogues
作者:Richard H. Schlessinger、Carl P. Bergstrom
DOI:10.1016/0040-4039(96)00208-0
日期:1996.3
The potassium enolates of the 3 and 4-amino furanones 4 and 12 have been silylated with polymer 3. The resulting polymer-bound nonracemic amino furans 5 and 11 were found to undergo the Diels-Alder reaction with a variety of dienophiles. The endo-adducts derived from methyl acrylate were both directly cleaved from the polymer and or synthetically manipulated and then cleaved from the polymer to demonstrate
3和4-氨基呋喃酮4和12的烯醇钾已经被聚合物3甲硅烷基化。发现与聚合物结合的非外消旋氨基呋喃5和11与多种亲双烯体进行狄尔斯-阿尔德反应。衍生自丙烯酸甲酯的内加合物既可以直接从聚合物上裂解,也可以进行合成操作,然后再从聚合物上裂解,以证明它们在> 99%de中的形成。