Stereoselective Michael addition of 6-amino-1,3-dimethyl-2,4-pyrimidinedione to the exocyclic methylene of three sesquiterpene lactones.<sup>1</sup>H and<sup>13</sup>C NMR evidence of a new C-C bond and lactam formation
作者:Eduardo Dfaz、Hector Barrios、Jose Luis Nava、Raul G. Enriquez、Angel Guzmán、León G. Leticia、Jose Fernando Fuentes、Fuentes B. Aidee、Angelina Quintero、Jose Dolores Solano
DOI:10.1002/jhet.5570340351
日期:1997.5
The Stereoselective addition of the pyrimidine derivative 1 to the exocyclic methylene of the α,β unsaturated dehydrocostus lactone 2, Ivalin acetate 3 and Zaluzanin A diacetate 4, was achieved resulting in a new C-C bond formation. In the cases of compounds 3 and 4, after the addition, the lactone was cleaved followed by reclosure into a lactam ring system.
将嘧啶衍生物1立体选择性地加到α,β不饱和脱氢肋骨内酯2,乙酸伊伐林乙酸酯3和Zaluzanin A二乙酸酯4的环亚甲基中,导致形成新的CC键。在化合物3和4的情况下,添加后,将内酯裂解,然后重新封闭成内酰胺环系统。