Patent · US Expired

Preparation of N-cyanoimidate herbicide intermediates

US4287343A · kind A · utility

0Cited by

3References

7Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventor

Edward K. W. Wat · Wilmington, US

Key dates

Filing date	Oct 4, 1979
Grant date	Sep 1, 1981
Priority date	—
Expiry date	Oct 4, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D239/58
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Certain N-cyanoimidates are prepared by (a) contacting a propendimidate dihydrohalide salt with two equivalents of a base to produce a bisimidate; (b) contacting the bisimidate with cyanogen chloride to produce a mixture of N-cyanoimidate and a monohydrohalide bisimidate salt; (c) isolating the N-cyanoimidate. The N-cyanoimidate may, by heating, be converted to a pyrimidine, useful as a herbicide intermediate.

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