64182-61-2Relevant articles and documents
Preparation method of substituted nitrobenzene compound
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Paragraph 0070-0073; 0076-0087, (2019/03/29)
The invention discloses a preparation method of a substituted nitrobenzene compound. The method comprises the following steps: carrying out a decarboxylation reaction as shown below on a compound II under the action of alkali in a solvent at the temperature of 150 to 250 DEG C to obtain a compound I; the alkali is one or more of carbonates and bicarbonates of alkali metals. Compared with some metal-catalyzed decarboxylation methods, the preparation method of the substituted nitrobenzene compound has the advantages of simple operation, low production cost, convenient post-treatment and high yield, and more application values in industrial production.
2,3,4,4A-Tetrahydro-1H-pyrazino[1,2-a,]quinoxalin-5(6H)-ones and derivatives thereof for relieving hypertension
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, (2008/06/13)
Compounds of the formula STR1 wherein R is hydrogen (lower)alkyl, phen(lower)alkyl, benzoyl(lower)alkyl, or p-halobenzoyl(lower)alkyl; R1 is hydrogen or (lower)alkyl; R2 is hydrogen, (lower)alkyl, (lower)alkoxy, chlorine, fluorine, trifluoromethyl, or amino in the 7-, 8-, or 9-position; R3 is hydrogen, or (lower)alkyl; and R4 is hydrogen, (lower)alkyl, (lower)alkoxy, chlorine, fluorine, or trifluoromethyl in the 7-, 8-, or 9-position; or the non-toxic acid addition salts thereof; exert a hypotensive effect in hypertensive animals.