S 98 Synthesis of dispiro heteroanalogs of pyrrolizidine alkaloids: Crystal and molecular structure of substituted 3',4",5-trioxodispiro[(2",5"- cyclohexadiene)-1"(4"H),7'-[7H]pyrrolizine-2'(3'H),2-[2H]pyrrole] -1'-carboxamide [Electronic resource] / V. V. Konovalova, Y. S. Rozhkova, Yu. V. Shklyaev, P. A. Slepukhin, A. N. Maslivets // ARKIVOC. - 2014. - №4. - С. 124-134. - Bibliogr. : p. 134 (14 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): HETEROCYCLIZATION -- PYRROLIZIDINE ALKALOIDS -- BENZOXAZINE Аннотация: 3-Aroyl-1H-pyrrolo[2,1-c][1,4]benzoxazine-1,2,4-triones react with substituted 2-(3,3-dimethyl-8-oxo-2-azaspiro[4.5]deca-6,9-dien-1-ylidene) acetamides to produce substituted 3',4",5-trioxodispiro[(2",5"- cyclohexadiene)-1"(4"H),7'-[7H]pyrrolizine-2'(3'H),2-[2H]pyrrole] systems. The crystal and molecular structure of substituted 3',4",5- trioxodispiro[(2",5"-cyclohexadiene)-1"(4"H),7'-[7H] pyrrolizine-2'(3'H),2-[2H]pyrrole]-1'-carboxamide was confirmed by X-ray analysis |