Polyhalogenated heterocyclic compounds. Part 41. Cycloaddition reactions involving hexafluorobut-2-yne and 1,1,1,2,4,4,4-heptafluorobut-2-ene
作者:Richard D. Chambers、Alex J. Roche、Michael H. Rock
DOI:10.1039/p19960001095
日期:——
Cycloadducts, formed by addition of hexafluorobut-2-yne, may be transformed into bis(trifluoromethyl)-benzene, -phenol and -furan derivatives. Tetrakis(trifluoromethyl)benzene may also be produced. Heptafluorobut-2-ene 2 is also a very efficient dienophile for reactions with cyclopentadiene and furan. Reaction of 2 with furan derivatives at elevated temperatures gives a very effective ‘one pot’ synthesis of 3,4-bis(trifluoromethyl)furan derivatives.
通过六氟丁-2-炔加成形成的环加成物,可以转化为双(三氟甲基)苯、苯酚和呋喃衍生物。四(三氟甲基)苯也可以合成。七氟丁-2-烯2对于与环戊二烯和呋喃的反应也非常有效。在升高的温度下,2与呋喃衍生物反应可以非常有效地实现3,4-双(三氟甲基)呋喃衍生物的“一锅”合成。