Patent · US Expired

Method of preparing alkoxymethylene compounds

US4468353A · kind A · utility

0Cited by

5References

6Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Otto Ackermann
Dieter Bretzinger · Güstrow, DE
Herbert Schneidewind · Troisdorf, DE
Rudolf Stephan · Ludwigshafen, DE

Key dates

Filing date	Sep 30, 1982
Grant date	Aug 28, 1984
Priority date	—
Expiry date	Sep 30, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C255/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

An improvement in the alkoxylation of a compound having a reactive methylene group by contacting said compound with an orthoformic acid trialkyl ester in the presence of a catalyst, the improvement residing in employing at least 1.6 moles of orthoformic acid ester per mole of compound having a reactive methylene group and carrying out the process in the presence of a catalyst of the group of aliphatic carboxylic acids, anhydrides of aliphatic carboxylic acids, aromatic sulphonic acids, alkali metal alcoholates and alkanolamines.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.