which were further transformed into polycyclic pyrrole-2-carboxylates via iridium-catalyzed cycloisomerization/Diels–Alder cycloaddition/dehydrogenation sequence under conventional and microwave heating conditions. The corresponding β-amino acid analogues were obtained from the Ir-catalyzed reaction of enynes prepared from lithium amides of allylamines with methyl non-2-en-4-ynoate. The Cu-catalyzed
CuBr 2催化的N-苄基
烯丙基胺,
乙二醛酸
乙酯和末端
炔烃的三组分偶联提供了甘
氨酸盐系的1,6-
炔烃,它们通过
铱催化的环异构化/ Diels-Alder环加成反应进一步转化为多环
吡咯-2-羧酸酯。 /在常规和微波加热条件下的脱氢顺序。相应的β-
氨基酸类似物是从
烯丙基胺的
氨基
锂锂与壬-2-烯-4-
乙酸甲酯制备的烯炔的Ir催化反应中获得的。
铜催化的曼尼希型缩合反应进一步扩展到甘
氨酸酯束缚的二烯炔和
环丙炔的合成,对它们进行Rh催化的环异构化以提供双环
氨基酸。