| 摘要 |
A process for preparing a compound of formula (IV) wherein Z is H, halogen or nitro- or H3CSOX-, where X is 0, 1 or 2 so that a) an oxazoline compound of formula (I) contacts with a reagent capable of causing an equilibrium between oxazoline compound (I) and an oxazoline compound of formula (II) described herein, wherein Z is as defined hereinbefore, and the reagent drives the equilibrium toward oxazoline compound (II) by preferential precipitation of oxazoline compound (II); b) contacting compound (II) with a fluorinating agent to give a fluorinated oxazoline compound of formula (III) described herein; and c) hydrolyzing the compound of formula (III) to formula (IV).
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