anion of dimethyl homophthalate adds to imidazolinium and tetrahydropyrimidinium salts () to yield imidazolidine and tetrahydropyrimidine adducts corresponding to methylenetetra-hydrofolate models (). These models transfer the carbon fragment 2-(MeOOC)C6H4CH(COOMe)CHXXX to tryptamine to give an enamino ester intermediate which is cyclized, in two steps to the yohimboid skeleton.
高
邻苯二甲酸二甲酯的阴离子加到
咪唑啉鎓盐和四氢
嘧啶鎓盐()中,生成对应于亚甲基四氢叶酸型号()的
咪唑烷和四氢
嘧啶加合物。这些模型将碳片段2-(MeOOC)C 6 H 4 CH(COOMe)CHXXX转移到
色胺中,得到烯胺酸酯中间体,该中间体经环化在两步中到达
育亨宾类骨架。