- Convenient synthesis of 1,3-substituted-6-phenylpiperazin-2-ones
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The convenient preparation of novel 6-phenylpiperazin-2-ones from simple starting materials via a practical two-step procedure is presented. This methodology involves an initial alkylation of 2-bromoacetophenone with an amino ester followed by a one-pot r
- Gallicchio, Steven N.,Bell, Ian M.
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experimental part
p. 3817 - 3819
(2009/10/11)
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- NOVEL THIAZINE OR PYRAZINE DERIVATIVES
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An object of the present invention is to synthesize novel compounds having 3-oxo-3, 4-dihydro-2H-1, 4-thiazine or 2-oxo-1, 2, 3, 4-tetrahydropyrazine as a main skeleton. The present invention relates to compounds represented by the following general formula [I] and salts thereof. In the formula, X is S or R6-(A2)n-N, R1 and R2 are H, alkyl, cycloalkyl or aryl, R3 and R4 are H, alkyl, cycloalkyl, aryl or aromatic heterocycles, R5 is H, alkyl, cycloalkyl, aryl or -A3-A4-R7, R6 is H, alkyl, cycloalkyl, OH, alkoxy, aryl, aryloxy or an aromatic heterocycle, R7 is H, alkyl, OH, alkoxy, aryl, aryloxy, amino, alkylamino, arylamino, an aromatic heterocycle or a nonaromatic heterocycle, A1 is alkylene, A2 is carbonyl or sulfonyl, A3 is alkylene, and A4 is carbonyl or oxalyl.
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