| 摘要 |
<p>PT--80187 A The cpds. are of formula (IV), in which R1 is H or CH3. They are made by hydrolysis of the ester of formula (III) in which R is 1-3C alkyl, which is prepd. by reaction of a cpd. of formula (II) with a cpd. of formula (I), in which X is a halogen atom. EPAB- EP-195135 B A process for the preparation of a compound of the formula (IV) wherein R1 is a hydrogen atom or a methyl group, which comprises saponifying a compound of the formula (III), wherein R1 is a hydrogen atom or a methyl group, which is prepared by the reaction of a compound of the formula (II), wherein R1 has the above-stated meaning, with a compound of the formula (I) which is prepared by the reaction of a compound of the formula (V), with 2-fluoroethyl tosylate.</p> |
