the rapid Johnson–Claisen rearrangement of allyl alcohol and triethyl orthoacetate with a continuous flow apparatus combined with a microwave reactor. The reaction could be carried out without solvent, and only a catalytic amount of aceticacid was sufficient to promote the reaction under microwave irradiation conditions. To confirm the optimal reaction conditions found experimentally, we performed Design
By-product recycling process in the production of lower alkyl 3.3-dimethyl-4-pentenoate esters
申请人:FMC Corporation
公开号:EP0019374A1
公开(公告)日:1980-11-26
3-Methyl-2-butenyl 3,3-dimethyl-4-pentenoate, which is a by-product in a condensation reaction between 3-methyl-2-butene-1-ol and a lower alkyl orthoacetate, is alkoxylated with a lower alkyl alcohol or orthoacetate in the presence of a basic ester exchange catalyst to enable it to be recycled to the condensation.
Process for the synthesis of gamma-unsaturated carboxylic acid esters
申请人:ICI AUSTRALIA LIMITED
公开号:EP0040958A1
公开(公告)日:1981-12-02
The invention concerns a process for the preparation of y-unsaturated carboxylic acid esters by the slow addition, in the presence of an acid catalyst, of an allyl alcohol to triethyl orthoacetate heated to a temperature at or near its boiling point.