作者:Werner Weingärtner、Gerhard Maas
DOI:10.1002/ejoc.201201005
日期:2012.11
Thermal and microwave-assisted [3+2] cycloadditions between differently substituted propiolamidinium tetraphenylborates 3a–d and N-methyl-C-phenylnitrone, benzyl azide, and N-(3-azidopropyl)phthalimide were studied. The activation parameters of the [3+2] cycloaddition between alkyne 3a and benzyl azide were determined. A Diels–Alder reaction between the terminal alkyne 3a and cyclopentadiene could
研究了不同取代的丙脒鎓四苯基硼酸盐 3a-d 与 N-甲基-C-苯基硝酮、苄基叠氮化物和 N-(3-叠氮丙基)邻苯二甲酰亚胺之间的热和微波辅助 [3+2] 环加成。确定了炔烃 3a 和苄基叠氮化物之间 [3+2] 环加成的活化参数。借助微波活化可以实现末端炔烃 3a 和环戊二烯之间的 Diels-Alder 反应。3a 和三苯基正膦亚胺之间的反应提供了 β,β-双(二甲氨基)乙烯基鏻盐 21,它可能是也可能不是通过最初的 [2+2] 环加成反应形成的。