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    • 4. 发明授权
    • Process for selective preparation of hydroxybenzaldehydes
    • 选择性制备羟基苯甲醛的方法
    • US5395978A
    • 1995-03-07
    • US154255
    • 1993-11-18
    • Laurent WeisseRobert NeunteufelHeinz Strutz
    • Laurent WeisseRobert NeunteufelHeinz Strutz
    • C07B61/00C07C45/49C07C47/565C07C47/57
    • C07C47/565C07C45/49C07C47/57
    • Process for preparing hydroxybenzaldehydes of the formula (1) ##STR1## in which R.sup.1 -R.sup.4 are hydrogen, fluorine, chlorine, bromine, alkyl, alkoxy, phenyl, naphthyl, phenylalkyl, naphthylalkyl, phenoxy or saturated or unsaturated cyclopentane or cyclohexane radicals, and R.sup.1 -R.sup.4 may with the hydroxybenzene ring carbon atoms on which they are located form 1 or 2 saturated or unsaturated isocyclic or heterocyclic rings, by admixing 1 mol of a phenol of the formula (2) ##STR2## in which R.sup.1 -R.sup.4 have the stated meanings, in a pressure vessel with from 5 to 100 mol of hydrogen fluoride and from 0.5+x to 1.5+x mol of boron trifluoride, where x is the number of oxygen atoms contained in the starting compound (formula (2)), setting the mixture to from -10.sup..degree. to 100.degree. C. and then passing carbon monoxide into this mixture until a pressure of from 10 to 150 bar is reached and allowing the mixture to react at the desired pressure reached.
    • 制备式(1)的羟基苯甲醛的方法其中R 1 -R 4是氢,氟,氯,溴,烷基,烷氧基,苯基,萘基,苯基烷基,萘基烷基,苯氧基或饱和或不饱和环戊烷或环己烷 自由基和R1-R4可以与它们所位于的羟基苯环碳原子一起形成1或2个饱和或不饱和的环或杂环,通过将1mol式(2)的苯酚(2)在 在具有5至100摩尔氟化氢和0.5 + x至1.5 + x摩尔三氟化硼的压力容器中,R1-R4具有所述含义,其中x为起始化合物中所含的氧原子数( 式(2)),将混合物置于-10℃至100℃,然后将一氧化碳通入该混合物中直至达到10至150巴的压力,并使混合物在达到的所需压力下反应。