Patent · US Active

Process for the preparation of substituted phenylpropanones

US9073839B2 · kind B2 · utility

0Cited by

0References

3Claims

0Family size

Assignee

Syngenta Participations AG · CH

Inventors

Daniel Stierli · Chur, CH
Harald Walter · Horgen, CH

Key dates

Filing date	Feb 28, 2012
Grant date	Jul 7, 2015
Priority date	—
Expiry date	Feb 28, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/516
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of a compound of formula (I) wherein the substituents are defined as in claim 1, which process comprises adding a compound of formula (II), wherein R1, R2 and R3 have the meanings as described under formula (I), in the presence of an inert organic solvent, to a mixture comprising an organic nitrite of formula (III) R4-O—N═O, wherein R4 is C1-C8alkyl, a compound of formula (IV), and an inert organic solvent.

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