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Hydrazionolysis of 4-acetylmethylene-1,5-benzodiazepin-2-ones 1, 2 gives, depending on the experimental conditions, either N-(2-aminophenyl) 5′-methyl-3′-pyrazolyl acetamides 3-4 or 2-benzimidazolyl-5′-methyl-3′-pyrazolylmethanes 5-6.Essassi, E. M....
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Due to the nature of this class of equations, the solution must be defined as a generalised process (in the sense of Dawson and Fernique). We provide sufficient conditions for the law of the variables of the solution process to be absolutely continuous with respect to Lebesgue measure....
pyronessynthetic methodsTwo steps is the rule: A concise synthesis of versatile ′-methoxy--pyrones (see scheme) is described that uses an innovative desymmetrization of ,′-dimethoxy--pyrone, relying upon conjugate addition of nucleophiles. This new strategy is applied to the preparation of -...
Variations of these activities were checked in the transfer cells of the cotyledonary node in the intact or decapitated plant. They were also studied in the shoot apex of both inhibited (G0state) and released cotyledonary buds, during the transitions G1–S orG2–M. The adenylate cyclase ...
II) 4′9,10- trimethyl -1,2- benzanthracene (III) has been prepared: a) By a Grignard reaction between methyl-magnesium iodide and 4′-methyl-1,2-benzanthraquinone (see above) by the method of Sandin and Fieser. b) starting from 1,2-benzanthraquinone by the following steps: ...
In addition, a fast equilibrium protonation of the carbanion2is found to precede its conversion to1at low pH, i.e., pH < 5. The resulting protonated species is suggested to be the nitronic acid2,Harising from fast protonation of aparaNO2group of2. Thevalue associated with the ...