中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1-(4-methoxy-phenylethynyl)-cyclopropanecarboxylic acid | 862574-82-1 | C13H12O3 | 216.236 |
2-(Pyridinium-1-yl)-1,1-bis(triflyl)ethanides have been used as 1,2-dipole precursors in a metal-free direct [2+2] cycloaddition reaction of alkynes. Remarkably, this mild and facile uncatalyzed protocol requires neither irradiation nor heating.