Patent · US Expired

Process for the preparation of .alpha.-methylene lactones

US6313318A · kind A · utility

12Cited by

1References

27Claims

0Family size

Assignee

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

Inventors

Dale Robert Coulson · Wilmington, US
Leo Ernest Manzer · Wilmington, US
Norman Herron · Newark, US

Key dates

Filing date	Mar 20, 2000
Grant date	Nov 6, 2001
Priority date	—
Expiry date	Mar 20, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D307/58
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

This invention concerns a process for the addition of formaldehyde to the .alpha. carbon atom of lactones for the production of .alpha.-methylenelactones, and specifically .alpha.-methylene-.gamma.-butyrolactone.

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