Chemical Modification of Plant Alkaloids. 4. Reaction of Cotarnine with Bifunctional NH- and CH-Acids
作者:K. A. Krasnov、V. G. Kartsev、S. F. Vasilevskii
DOI:10.1007/s10600-005-0174-z
日期:2005.7
1-Substituted 1,2,3,4-tetrahydroisoquinoline systems were prepared by reaction of cotarnine with the NH-and CH-acids methyl- and acyl derivatives of pyrazole and 1,3-dicarbonyl reagents. Depending on the structure and reaction conditions, bifunctional pyrazole nucleophiles can give substitution products at the N atom, methyl, or acyl group; 1,3-diketones, at the terminal methyl. Rearrangements occurring during the reaction of cotarnine with bifunctional substrates were studied.
1-取代的 1,2,3,4-四氢异喹啉系统是由肉桂碱与吡唑的 NH 和 CH-酸性甲基和酰基衍生物以及 1,3-二羰基试剂反应制备的。根据结构和反应条件的不同,双官能团的吡唑亲核物可在 N 原子、甲基或酰基上产生取代产物;1,3-二酮可在末端甲基上产生取代产物。我们研究了柯塔宁与双官能团底物反应过程中发生的重排。