| 摘要 |
<p>Compounds of the formula I <IMAGE> in which n is 1, 2 or 3, R denotes acyl and R<1> denotes alkyl, cycloalkyl, aralkyl or another carboxyl protecting group are prepared by free-radical cyclisation of compounds of the formula II <IMAGE> in which n, R and R<1> are as defined above and Hal denotes chlorine, bromine or iodine. Intermediates of this process and their use are also described. </p> |
