Patent · US Expired

2-Phenyl-6-(1-hydroxy-2-t-butylaminoethyl)-4H-pyrido[3,2-d]-1,3-dioxin maleate and its use as an intermediate

US4011231A · kind A · utility

4Cited by

1References

1Claims

0Family size

Assignee

PFIZER INC. · US

Inventors

Ronnie D. Carroll · Groton, US
Bernard S. Moore · Waterford, US
James R. Tretter · Waterford, US

Key dates

Filing date	Oct 3, 1975
Grant date	Mar 8, 1977
Priority date	—
Expiry date	Oct 3, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D213/65
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The maleic acid salt of 2-phenyl-6-(1-hydroxy-2-t-butylaminoethyl)-4H-pyrido[3,2-d]-1,3-dioxin, its preparation and use as an intermediate for making 2-hydroxymethyl-3-hydroxy-6-(1-hydroxy-2-t-butylaminoethyl)pyridine, an effective bronchodilator.

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