Claims
- 1. A method of preparing a compound of the formula II ##STR3## wherein R is linear or branched alkyl containing 1-10 carbon atoms and X.sup..theta. is an anion, comprising the steps of:
- (a) reacting substantially equimolar amount of 3-chloro-1,1,1-trifluoropropane with 3-amino-4-methylphenol in the presence of a base to form N-monoalkylated-3-amino-4-methylphenol;
- (b) purifying and drying at least a portion of said N-monoalkylated phenol from step (a) and then condensing said N-monoalkylated phenol with phthalic anhydride in a suitable solvent to form a compound of the formula: ##STR4## (c) treating the product of step (b) with a compound ROH in the presence of an acid to form a compound of the formula II.
- 2. A method according to claim 1 wherein said step (a) is conducted at a temperature in the range of 100.degree.-180.degree. C.
- 3. A method according to claim 1 wherein said step (a) is conducted at a pressure in the range of 100-500 psi.
- 4. A method according to claim 1 wherein the condensation in said step (b) is conducted in solvent comprising pseudocumene.
- 5. A method according to claim 1 wherein in said step (c) ROH is methanol and said acid is sulfuric acid.
Parent Case Info
This is a division of application Ser. No. 373,316, filed June 8, 1989, now U.S. Pat. No. 4,945,176.
Government Interests
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory
US Referenced Citations (2)
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Date |
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4622400 |
Hammond |
Nov 1986 |
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4895961 |
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3641630 |
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DEX |
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JPX |
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Non-Patent Literature Citations (2)
Entry |
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Divisions (1)
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Number |
Date |
Country |
Parent |
373316 |
Jun 1989 |
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