Patent · US Expired

Process for the preparation of acyloins

US5831097A · kind A · utility

7Cited by

4References

12Claims

0Family size

Assignee

BASF SE

Inventors

Klaus Ebel · Lampertheim, DE
Regina Schneider
Johann-Peter Melder · Schifferstadt, DE
Joaquim Henrique Teles · Waldsee, DE

Key dates

Filing date	Jan 21, 1997
Grant date	Nov 3, 1998
Priority date	—
Expiry date	Jan 21, 2017

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2231/342
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of acyloins of the general formula I ##STR1## in which R.sup.a and R.sup.b are the same or different and stand for hydrogen or an optionally substituted C.sub.1 -C.sub.20 alkyl, an optionally substituted C.sub.6 -C.sub.10 aryl, an optionally substituted C.sub.7 -C.sub.12 aralkyl, an optionally substituted heteroaryl, or an optionally substituted heterocycloalkyl group, except for autocondensation products of formaldehyde, wherein an aldehyde of the formula II EQU R.sup.a CHO, (II) is reacted, in the presence of a catalyst, with an aldehyde of the formula III EQU R.sup.b CHO, (III) in which PA1 R.sup.a and R.sup.b have the above meanings and at least one of the radicals R.sup.a and R.sup.b denotes a radical other than hydrogen, which have been produced, with the assistance of an auxiliary base, from a triazolium salt of the formula IV ##STR2##

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