(Meldrum’s acid, 1,3-cyclohexanedione, and N,N-disubstituted barbituric acids) proceeded stereoselectively giving spiro-joined 2,3,4,4a,5,6-hexahydro-1H-benzo[c]quinolizines with axially oriented hydrogen atoms in the positions 3 and 4a of the benzo[c]quinolizine ring.
通过2-(4-R-
哌啶子基)
苯甲醛与环状活性亚甲基成分(麦德鲁姆酸,
1,3-环己二酮和N,N-二取代
巴比妥酸)的“叔
氨基效应”机理进行环化。在苯并[c]
喹啉嗪环的3和4a位具有轴向取向的氢原子的螺旋连接的2,
3,4,4a,5,6-六氢-1 H-苯并[ c ]
喹唑啉。