Method for producing ethylenically unsaturated graftable orthoesters
申请人:GENERAL ELECTRIC COMPANY
公开号:EP0576147A1
公开(公告)日:1993-12-29
Ethylenically unsaturated graftable monomers are prepared by reacting hydroxy substituted orthoesters with electrophilic reagents, an alkaline reagent, and a phase transfer catalyst. Preferably the hydroxy orthoester is 4-hydroxymethyl-2-methoxy-2-methyl-1,3-dioxolane, and the preferred reagent is acryloyl chloride with sodium hydroxide as the base and methyltrialkylammonium (C₈₋₁₀) chloride as the phase transfer catalyst.
A method for making substituted orthoester monomers comprising the step of contacting diols having at least one graftable pi bond such as 1-allyloxy-2,3-propanediol, and orthocarboxylates such as trimethylorthoacetate in the absence or presence of inert solvents.