PHOSPHO-4-PYRAZOLES. SYNTHESE ET ETUDE SPECTROGRAPHIQUE RMN1H,31P ET13C
Authors:
- 1 October 1988
- journal article
- research article
- Published by Taylor & Francis in Phosphorus and Sulfur and the Related Elements
- Vol. 40 (1-2) , 63-68
Abstract
4-Phosphopyrazoles are prepared with good yield by cyclisation of hydrazone phosphorus compounds and ethylortho formiate. The effects of substitution are investigated on the 13C chemical shifts of pyrazole ring. The magnitude of the coupling constant 1 J pc is in good agreement with the hybridization of the phosphorus atom.Keywords
This publication has 12 references indexed in Scilit:
- Dialkyl formyl-1 methylphosphonates α-fonctionnels—IITetrahedron, 1985
- FROM ALLENIC PHOSPHORUS DERIVATIVES TO HETEROCYCLIC COMPOUNDS. SYNTHESIS OF A 1,2,3-DIAZAPHOSPHOLE COMPOUND WITH A STRONGLY POLAR NH GROUP LINKED TO A DICOORDINATE PHOSPHORUS ATOMPhosphorus and Sulfur and the Related Elements, 1985
- Synthese, Reaktionen und NMR-Spektren von 2-Brom-3-oxo-1-alkenyl- und 3-Oxo-1-alkinyl-phosphonsäure-dialkylesternMonatshefte für Chemie - Chemical Monthly, 1984
- Synthesis and multinuclear NMR study (1H, 11B, 13C, 14N, 15N, 31P, 77Se) of N-azolyl-phosphorus compoundsSpectrochimica Acta Part A: Molecular Spectroscopy, 1984
- Heterocyclische o‐Amino‐phosphonesterArchiv der Pharmazie, 1975
- Heterocyclic systems bearing phosphorus substituents. Synthesis and chemistryChemical Reviews, 1971
- Zur Darstellung von 4‐Phosphinyl‐pyrazolenZeitschrift für Chemie, 1968
- 622. Esters containing phosphorus. Part XVIII. Esters of ethynylphosphonic acidJournal of the Chemical Society (Resumed), 1963
- Acetylene-Allene Rearrangements. Reactions of Trivalent Phosphorus Chlorides with α-Acetylenic Alcohols and GlycolsThe Journal of Organic Chemistry, 1962
- A facile SNi′ rearrangement: the formation of 1,2-alkadienylphosphonates from 2-alkynyl phosphitesTetrahedron Letters, 1962