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US 5,183,934 AGranted
2-trifluoromethyl-4-hydroxybenzoic acid
AssigneeShowa Shell Sekiyu K.K.
InventorYoshiichi Suzuki
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Abstract
Disclosed is a novel compound 2-trifluoromethyl-4-hydroxybenzoic acid represented by the formula: ##STR1##
Claims3
A process for preparing 2-trifluoromethyl-4-hydroxybenzoic acid comprising:
- reacting a compound represented by the formula (I):
- ##STR7## with bromine in a solvent whereby a compound represented by the formula (II) is obtained:
- ##STR8## reacting a compound of formula (II) with methyl iodide at room temperature whereby a compound represented by the formula (III) is obtained:
- ##STR9## reacting a compound represented by the formula (III) with magnesium and carbon dioxide to prepare the compound represented by the formula (IV) ##STR10## and reacting the compound having the formula (IV) with boron tribromide.
1 more element
A process for preparing 2-trifluoromethyl-4-hydroxybenzoic acid wherein the compound represented by the formula:
- ##STR11## is reacted with more than the molar equivalent of bromine in a solvent to prepare the compound represented by the formula:
- ##STR12## and compound II is reacted with more than the molar equivalent of methyl iodide at room temperature to prepare the compound represented by the formula:
- ##STR13## and compound III is reacted with an equal mole of magnesium and CO.sub.2 to prepare the compound represented by the formula:
- ##STR14## and compound IV is reacted with boron tribromide.
1 more element
A polyester represented by the formula ##STR15## which is prepared by condensation of 2-trifluoromethyl-4-hydroxybenzoic acid ##STR16##
Dependencies are inferred from the claim text.