| 摘要 |
<p>The process comprises reaction of a cpd. of formula II: R1 is an opt. branched 1-4C alkyl, R2 is hydrogen or methyl, with a cpd. of formula R3-X in which X is a halogen or some other separable anionic group, and R3 is e.g. allyl, propargyl to give prods. of formula</p> |
