- Electrosynthesis of cyclic α-carbonylazo compounds. Chemical stability of the electrogenerated dienophiles and in situ trapping of dienes
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Dienophilic cyclic α-carbonylazo compounds were prepared electrochemically by oxidation of the corresponding hydrazino compounds using a flow cell fitted with a graphite felt anode in acidic methanol or acetonitrile. The instability of these compounds in methanol was first studied. In situ Diels-Alder additions of these electrogenerated dienophiles and various dienes were performed in relatively good yields in acidic methanol or acetonitrile.
- Lorans,Hurvois,Moinet
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p. 807 - 813
(2007/10/03)
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- Therapeutic preparations containing indazole derivatives
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The invention concerns pharmaceutical compositions containing a 1,2-dihydro-3H-indazol-3-one derivative of the formula I STR1 wherein Ra is hydrogen, halogeno, nitro, hydroxy, (2-6C)alkanoyloxy, (1-6C)alkyl, (1-6C)alkoxy, fluoro-(1-4C)alkyl, (2-6C)alkanoy
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- Heterocyclic agents
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The invention concerns a 1,2-dihydro-3H-indazol-3-one derivative of formula I STR1 wherein Ra is hydrogen, halogeno, hydroxy, cyano, trifluoromethyl, 1-6C)alkyl or (1-6C)alkoxy; Rb is hydrogen or (1-6C)alkyl; Rc is hydrogen, (1-8C)alkyl or (3-8C)alkenyl;
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- Preparation of hexahydroindazolones
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This invention relates to a novel process for the preparation of hexahydroindazolones useful as herbicides by condensation of an aromatic hydrazine source with a cyclohexanone 2-carboxamide, under controlled reaction conditions.
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