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 Stereoselectiveaddition of the pyrimidine derivative 1 to the exocyclicmethylene of the α,β unsaturated dehydrocostus lactone 2, Ivalin acetate 3 and Zaluzanin A diacetate 4, was achieved resulting in a newC-Cbondformation. In the cases of compounds 3 and 4, after the addition, the lactone was cleaved followed by reclosure into a lactam ring system.