Patent · US Expired

Preparation of bicyclic enol-ethers, and novel ethers of 2-(3-hydroxyprop-l-yl)-cycloalkanones

US4268445A · kind A · utility

6Cited by

2References

1Claims

0Family size

Assignee

BASF SE

Inventors

Rudolf Kropp · Schifferstadt, DE
Frank Thoemel · Weinheim, DE
Axel Nuerrenbach · Havelsee, DE
Werner Hoffman · Schifferstadt, DE
Franz Wenisch · Bischofswerda, DE
Hartwig Fuchs · Ludwigshafen, DE

Key dates

Filing date	Jan 31, 1980
Grant date	May 19, 1981
Priority date	—
Expiry date	Jan 31, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D311/74
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The preparation of bicyclic enol-ethers (I) ##STR1## (where n is from 3 to 12, and R.sup.1, R.sup.2 and R.sup.3 may be H or C.sub.1 --C.sub.4 -alkyl) by free radical adduct formation of CHR.sup.1 =CR.sup.2 --CHR.sup.3 --O--R.sup.4 (III)(where R.sup.4 is tert.-butyl, tetrahydrofuran-2-yl or tetrahydropyran-2-yl) with a cyclic ketone (IV) ##STR2## followed by acid-catalyzed cyclization, and novel compounds II ##STR3## The compounds (I) and (II) are intermediates for the synthesis of musk-like fragrances.

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