| 摘要 |
A process is described for preparing compounds of formula (I) where R is H, optionally halogen-substituted alkyl, cycloalkyl, aryl, alkyl-aryl or heteroaryl, and, in alkyl and cycloalkyl, one or more CH2 groups may be replaced by -O-. The compounds of the formula (I) are valuable intermediates in the synthesis of PPAR agonists.
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