Patent · US Active

Process for he production of organic dithiopyrophosphates

US8324418B2 · kind B2 · utility

0Cited by

1References

4Claims

0Family size

Assignee

LONZA LTD · CH

Inventors

Gesa Paradies · Brig, CH
Thomas Riedel · Wuppertal, DE
Christian Schnider · Visp, CH

Key dates

Filing date	Oct 21, 2009
Grant date	Dec 4, 2012
Priority date	—
Expiry date	Feb 16, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/657136
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Organic dithiopyrophosphates of formula wherein R1, R2, R3, R4 and R5 independently are hydrogen, C1-4 alkyl, chloromethyl or bromomethyl, are prepared in a two-step process from the corresponding 1,3-diols and thiophosphoryl chloride, using 3-methylpyridine both as solvent and as base.

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