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.
乙烯基不饱和可接枝单体是通过羟基取代的原酯与亲电试剂、碱性试剂和相转移催化剂反应制备的。优选的羟基取代原酯是 4-羟甲基-
2-甲氧基-2-甲基-1,3-二氧戊环,优选的试剂是
丙烯酰氯,
氢氧化钠为碱,甲基三烷基
氯化铵(C₈₋₁₀)为相转移催化剂。