Dimethylformamide diethylacetal → 7-benzyl-octahydro-5H,9bH-2a,4a,7,9a-tetraazacycloocta[cd]pentalene
反応式
[CH2:1]([N:8]1[CH2:19][CH2:18][NH:17][CH2:16][CH2:15][NH:14][CH2:13][CH2:12][NH:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:20](OC(OCC)N(C)C)C>C1C=CC=CC=1>[CH2:1]([N:8]1[CH2:19][CH2:18][N:17]2[CH2:16][CH2:15][N:14]3[CH2:13][CH2:12][N:11]([CH:20]23)[CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1参加物
4
実験手順
A solution of 1-benzyl-1,4,7,10-tetraazacyclododecane (4 g; 0.015 mol) and dimethylformamide diethylacetal (6.88 g; 0.0467 mol) in benzene (40 ml) is heated at 80 C. and the azeotropic mixture ethanol-benzene is distilled away. When the conversion is ended, the solvent is evaporated under reduced pressure and the final product is obtained as a yellow oil (4.0 g). Yield 96%