No abstract

No abstract

A method for the synthesis of 1 methyl 3,5 dinitropyrazole 4 carbonitrile from 1,4 di methyl 3,5 dinitropyrazole was developed. Nucleophilic substitution in 1,4 dimethyl 3,5 dinitropyrazole, 1 methyl 3,5 dinitropyrazole 4 carboxamide, and 1 methyl 3,5 dinitro pyrazole 4 carbonitrile involves solely the 5 NO 2 group in the ring. 1 Methyl 3,5 dinitro pyrazole 4 carbonitrile reacts with thioglycolic acid phenylamide and potassium carbonate to give 4 amino 1 methyl 3 nitro N phenyl 1H thieno[2,3 c]pyrazole 5 carboxamide. The use of glycolic acid phenylamide instead of thioglycolic acid N phenylamide under analogous conditions resulted in 5 anilino 1 methyl 3 nitro 1H pyrazole 4 carbonitrile. An explana tion for the regiospecificity of the nucleophilic substitution of the 5 NO 2 group in 4 R 1 methyl 3,5 dinitropyrazoles is given.

The diffuse X-ray determination of the energy of mixing in Ge-Si solid solutions carried out in (1) has revealed a tendency to segregation in this system. A s the nature of the effect i s not clear, it i s interesting to predict it theoretically. In the

The short-range order and elastic properties of Ge-Xi solid solutions of 28, 54, and 64% Si are studied by means of X-ray diffuse scattering measurements. The mixing energy of the system taking into account the existence of two f.c.c. sublattices in the diamond structure is determined by extrapolating the long-wave Fourier transforms of the concentration fluctuations Cq to q = 0 points corresponding to the node (400) Die elastischen Konstanten der Ge-Si-Legierung werden bestimmt und ihre positiven Abweichungen aus den zusiitzlichen Werten erhalten, die in guter Ubereinstimmung mit den Werten des Gitterparameters des Systems sind.

4 Methyl 3,5 dinitropyrazole prepared by nitration of 1,4 dimethylpyrazole readily reacts with methoxymethyl chloride and methyl vinyl ketone in acetonitrile in the presence of a base giving 1 methoxymethyl 4 methyl 3,5 dinitropyrazole and 4 methyl 3,5 dinitro 1 (3 oxo butyl)pyrazole, respectively. The action of the thioglycolanilide anion on 4 methyl 3,5 di nitro 1 (3 oxobutyl)pyrazole results only in the removal of 1 protecting group and the forma tion of 2 [(3 oxobutyl)thio]acetanilide, while the action of anionic S nucleophiles on 1 meth oxymethyl 4 methyl 3,5 dinitropyrazole leads to the substitution products of the 5 NO 2 group in which the methoxymethyl group can be removed by acid hydrolysis.

No abstract

No abstract