Organomanganese (II) reagents XII: An efficient one-pot preparation of unsymmetrical secondary or tertiary alcohols
作者:G Cahiez、J Rivas-Enterrios、H Granger-Veyron
DOI:10.1016/s0040-4039(00)84973-4
日期:1986.1
Various unsymmetrical secondary or tertiary alcohols have been prepared in high yields by an efficient one-pot procedure involving the acylation of an organomanganese reagent by an acyl chloride and addition to the ketone formed of various organometallic compounds (RLi, RmgX, LiAlH4, NaBH4. The complexation of the intermediate ketone by the metallic salts present in the reaction mixture allows to perform
Barium oxide is used as an ethoxylation catalyst for the reaction of ethylene oxide and alkanols of all classes. The reaction is carried out at temperatures of from about 200 to about 500° F to yield the ethoxylated product. The product abtained has a very narrow, high adduct distribution with low levels of by-products and unreacted free alcohols. Calcium and magnesium oxides show no catalytic effect.
Basic compounds of strontium catalyzed the ethoxylation of alcohols in the presence of phenol or alkylphenol co-catalyst. Strontium-produced ethoxylates have sharper ethylene oxide distributions, lower free alcohol, lower pour points, and better detergency than the ethoxylates obtained from alkali base catalysis.
Barium-containing alkoxylation systems are used as catalysts for the alkoxylation of alcohols of all classes. The reaction is carried out at temperatures of from about 90 to about 260°C to yield an alkoxylation product The products obtained have very narrow adduct distribution with low levels of by-products and unreacted free alcohols. Several classes of materials which promote these reactions are disclosed.
A method for the alkoxylation of alkanols in the presence of strontium-containing catalysts and promoters
申请人:Conoco Inc.
公开号:EP0034648A2
公开(公告)日:1981-09-02
Strontium-containing alkoxylation systems are used as catalysts for the alkoxylation of alcohols of all classes. The reaction is carried out at temperatures of from about 90 to about 260°C to yield an alkoxylation product. The products obtained have very narrow adduct distribution with low levels of by-products and unreacted free alcohols. Several classes of materials which promote these reactions are disclosed.