1,3-Dipolar Cycloaddition Reactions of Organic Azides with Morpholinobuta-1,3-dienes and with anα-Ethynyl-enamine
作者:Martina Brunner、Gerhard Maas、Frank-Gerrit Klärner
DOI:10.1002/hlca.200590142
日期:2005.7
1H-triazoles 4a,d or α,β-unsaturated carboximidamide 5 (Scheme 1). The cycloaddition reaction of 4-[(1E,3Z)-3-morpholino-4-phenylbuta-1,3-dienyl]morpholine (7) with azide 2a occurs at the less-substituted enamine function and yields the 4-(1-morpholino-2-phenylethenyl)-1H-1,2,3-triazole 8 (Scheme 2). The 1,3-dipolar cycloaddition reaction of azides 2a–d with 4-(1-methylene-3-phenylprop-2-ynyl)morpholine (9) is
研究了有机叠氮化物与2-氨基-1,3-二烯,1-氨基-1,3-二烯和2-氨基丁-1-烯-3-炔类型的一些共轭烯胺的环加成反应。2-morpholinobuta-1,3-diene 1与几种亲电子叠氮化物RN 3 2(a,R = 4-硝基苯基; b,R =乙氧羰基; c,R =甲苯磺酰基; d,R =苯基)以形成5-烯基-4,5-二氢-5-吗啉代-1 H -1,2,3-三唑3,它们被转化为1,5-二取代的1 H-三唑4a,d或α,β-不饱和羧酰亚胺5(方案1)。4-[(1 E,3 Z)-3-morpholino-4-phenylbuta-1,3-dienyl] morpholine(7)与叠氮化物2a的环加成反应发生在取代度较低的烯胺官能团上并产生4-( 1-吗啉代-2-苯基乙烯基)-1 H -1,2,3-三唑8(方案2)。叠氮化物2a – d与4-(1-亚甲基-3-苯基丙-2-炔基)吗