Preparation of alpha -oxo- alpha -(3-alkoxycarbonyl-2,2-dimethyl-cycloprop-1-yl)-methane-phosphonic acid esters

Preparation of alpha -oxo- alpha -(3-alkoxycarbonyl-2,2-dimethyl-cycloprop-1-yl)-methane-phosphonic acid esters

A process for the preparation of an alpha -oxo- alpha -(3-alkoxycarbonyl-2,2-dimethyl-cycloprop-1-yl)-methane-phosphonic acid ester of the formula in which R is alkyl or a radical customary in the alcohol component of pyrethroids, and R1 is alkyl or phenyl, or the two radicals R1 together are alkane...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: HOFFMANN, HELLMUT
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A process for the preparation of an alpha -oxo- alpha -(3-alkoxycarbonyl-2,2-dimethyl-cycloprop-1-yl)-methane-phosphonic acid ester of the formula in which R is alkyl or a radical customary in the alcohol component of pyrethroids, and R1 is alkyl or phenyl, or the two radicals R1 together are alkanediyl, comprising reacting beta , beta -dimethyl-acrylic acid chloride of the formula with a phosphorous acid ester of the formula R4O-P(OR1)2 in which R4 is alkyl, at a temperature between about 0 DEG and 100 DEG C., to produce the novel compound 1-oxo-3-methyl-2-butene-phosphonic acid of the formula which is then reacted with a sulphuranylidene-acetic acid ester of the formula in which R2 and R3 each independently is alkyl or together are alkanediyl, at a temperature between about 0 DEG and 100 DEG C.