smoothly under mild conditions. In contrast, other Brønsted acids tested, including HCl, HI, HBF4, HPF6, TFA, PTSA, H2SO4, TfOH etc., are almost ineffective under identical conditions or require harsh reaction conditions.
由10mol%的
氢溴酸催化,
萘酚的羟烷基化和烯丙基化-
碘环化在温和的条件下顺利进行。相反,测试的其他布朗斯台德酸,包括HCl,HI,HBF 4,HPF 6,TFA,
PTSA,H 2 SO 4,TfOH等,在相同条件下或要求苛刻的反应条件下几乎无效。