The ethylaluminum dichloride catalyzed Michael-type addition of indoles 1a-h to the N-(diphenylmethylene)-α,β-didehydroamino acid esters 2a-c allows a new synthesis of β-methyltryptophanes 41,m and a new route for 1,1-diphenyl-3-carbalkoxy-1,2,3,4-tetrahydro-β-carbolines 5a-m.
二
氯化乙基铝催化
吲哚1a-h与N-(二苯基亚甲基)-α,β-二氢化氢
氨基酸酯2a-c的Michael型加成反应使得β-
甲基色氨酸41,m的新合成和1,1的新途径成为可能
-二苯基-3-碳烷氧基-1,2,3,4-四氢-β-咔啉5a-m。