Chemodivergent [3+3] annulations: The reactivity of Rh-enalcarbenoid has been switched from carbenoid to vinylogous NH-insertion by altering acyclic to cyclic α-amino ketones to deliver functionalized 1,2-dihydropyridines (1,2-DHPs) and fused 1,4-oxazines respectively. The structural diversification of 1,2-DHP and fused 1,4-oxazines gave valuable piperidines, pyrido[1,2-a]indole, 2-pyridone, hexahydroquinolin-2(1H)-ones
化学发散 [3+3] 环化:通过将无环 α-
氨基酮改变为环状 α-
氨基酮,Rh-enalcarbenoid 的反应性已从类
胡萝卜素转变为插烯 NH-插入,以提供功能化的 1,2-
二氢吡啶 (1,2-
DHP) 和融合分别为1,4-恶嗪。 1,2-
DHP和稠合1,4-恶嗪的结构多样化得到有价值的
哌啶、
吡啶并[1,2-a]
吲哚、2-
吡啶酮、六氢
喹啉-2( 1H )-酮、六氢
喹啉和
四氢喹啉酮。