申请人:Shell Oil Company
公开号:US04249015A1
公开(公告)日:1981-02-03
Carboxylic acids and/or esters are prepared by converting the ##STR1## moiety in a 1-substituted 2,2-trihaloethanol, or derivative wherein X represents halogen and R is hydrogen or an acyl group to an organic acid and/or ester grouping of the formula ##STR2## wherein R' is hydrogen or alkyl of 1 to 6 carbon atoms, in the process which comprises reacting the 1-substituted 2,2,2-trihaloethanol or acylated derivative with molecular oxygen in the presence of a catalyst comprising a complex of a transition metal having an atomic number from 21-30, 39-48 or 57-80 and at least one molecule of a ligand containing trivalent nitrogen, phosphorus, arsenic or antimony. This reaction is carried out in a reaction medium comprising an alcohol or aqueous alcohol having 1 to 6 carbon atoms optionally containing an alkali metal, said alcoholic solvent also serving as a reactant source when carboxylic acid esters are formed.
羧酸和/或酯可以通过将1-取代的2,2-三卤乙醇或其衍生物中的## STR1##基团转化为式## STR2##中R'为氢或1至6个碳原子的烷基的有机酸和/或酯基团来制备,其中X代表卤素,R为氢或酰基。该过程包括在过渡金属的复合物催化下,将1-取代的2,2,2-三卤乙醇或酰化衍生物与分子氧反应。所述过渡金属的原子序数为21-30、39-48或57-80,所述配体至少包含三价氮、磷、砷或锑的分子。该反应在反应介质中进行,所述反应介质包括含有1至6个碳原子的醇或水醇,可选地含有碱金属。当形成羧酸酯时,所述醇溶剂也作为反应物源。