HALOACETYLATED ENOL ETHERS .2. SYNTHESIS OF 5-TRIFLUOROMETHYLPYRAZOLES

被引：83

作者：

BRAIBANTE, MEF ^{[1
]}

CLAR, G ^{[1
]}

MARTINS, MAP ^{[1
]}

机构：

[1] UNIV FED SANTA MARIA,DEPT QUIM,BR-97119 SANTA MARIA,RS,BRAZIL

来源：

JOURNAL OF HETEROCYCLIC CHEMISTRY | 1993年 / 30卷 / 04期

关键词：

D O I：

10.1002/jhet.5570300459

中图分类号：

O62 [有机化学];

学科分类号：

070303 [有机化学]; 081704 [应用化学];

摘要：

1-Methyl-5-(trifluoromethyl)-1H-pyrazoles 2, 3 and 4,5-dihydro-1-phenyl-5-(trifluoromethyl)-1H-pyrazol-5-ol 4 were prepared by reaction of 4-alkoxy-1,1,1-trifluoro-3-alken-2-ones 1 and hydrazine, methylhydrazine, and phenylhydrazine, respectively, in good yields. Compound 1 proved to be a versatile building block for the regiospecific construction of pyrazole rings having an 5-trifluoromethyl substituent.

引用

页码：1159 / 1160

页数：2

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