考察了对氨基苯磺酸盐(铜、镍、锌、钴、铝、镉、锰、镧、亚钸、谱、钕、钐、铕、铽、镝、钬、铒)和布朗斯特酸在醇和酚的四氢吡喃化反应中的协同催化效应.其中,对氨基苯磺酸铜与乙酸的协同催化效果最好.室温无溶剂条件下,各种醇和酚的四氢吡喃化反应产率均较高.反应结束后,对氨基苯磺酸铜重复使用6次,催化活性无明显下降.%A synergistic catalytic effect between metal 4-aminobenzenesulfonates (Cu,Ni,Zn,Co,Al,Cd,Mn,La,Ce (Ⅲ ),Pr,Nd,Sm,Eu,Tb,Dy,Ho,Er)and Brφnsted acid in tetrahydropyranylation of alcohols and phenols was investigated.The catalytic system,combined copper 4-aminobenzcnesulfonate with acetic acid,proved to be very active.Various alcohols and phenols were tetrahydropyranylated in high yields at room temperature without solvent After reaction,copper 4-aminobenzenesulfonate could be recycled at least six times without significant loss of activity.
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