gem-Dinitro compounds in organic synthesis. 1. Synthesis of functionally substituted polynitro compounds with the use of the universal synthon, ethyl dinitroacetate
摘要:
Ethyl nitroacetate (I) was used as a synthon in the preparation of dinitromethane, dinitroacetic acid, 2,2-dinitroethanol, fluorodinitromethane, 1,1,3,3-tetranitropropane, and some condensation products of Henry and Mannich reactions. A number of dinitroacetaldehyde derivatives were also prepared: its potassium salt, oxime, and hydrazone, dinitroacetaldehyde azine; and mixed azines with other acetaldehydes.
New methods of preparation of nitrile oxides and the corresponding disubstituted furoxans by interaction of N2O4 with salts of substituted dinitromethanes
作者:N. N. Makhova、I. V. Ovchinnikov、V. G. Dubonos、Yu. A. Strelenko、L. I. Khmel'nitsky
DOI:10.1007/bf00699994
日期:1993.1
A newmethod of generation of nitrile oxides through interaction of N2O4 with salts of substituted dinitromethanes (1) has been worked out. It has been shown by1H,13C,14N NMR spectroscopy that this reaction proceeds via dinitronitrosomethyl intermediates (one of these has been isolated), and that the reaction is feasible only for substituents capable of conjugation with the nitrile oxide fragment.
作者:A. V. Fokin、Yu. N. Studnev、A. I. Rapkin、L. D. Kuznetsova
DOI:10.1007/bf01431113
日期:1996.11
A novel preparative method for the synthesis of geminal (difluoroamino)nitro compounds was developed, The method involves the reaction ofN,N-difluoro-O-fluorosulfonyl- hydroxylamine with the corresponding salts of nitro compounds, Dependences of the yields of (difluoroamino)nitro compounds on the reaction conditions, the nature of the cation in the salts, and the properties of solvents were studied