US 4,071,538 A · Pyran aldehydes

Abstract

A novel process for the preparation of polyene aldehydes which employs as starting materials, substituted 2H pyrans. Novel substituted 2H pyrans and polyene intermediates are also disclosed.

Claims3

Dependent claims

A compound of the formula:

##STR21## wherein R.sub.1, R.sub.2 and R.sub.3 are hydrogen or lower alkyl and R.sub.4 is lower alkyl.

Dependencies are inferred from the claim text.

Facts

Application

05/731,056Filed 8 Oct 1976 · division

Priority

9 Jul 1975

Granted

31 Jan 1978

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C07C 403/14
Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four…:…
C07D 309/30
With hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals,…:…
C07C 2601/16
With a six-membered ring: the ring being unsaturated
C07C
Acyclic or carbocyclic compounds

Abstract

A novel process for the preparation of polyene aldehydes which employs as starting materials, substituted 2H pyrans. Novel substituted 2H pyrans and polyene intermediates are also disclosed.

Pyran aldehydes

Life of this patent

Abstract

Claims3

Pyran aldehydes

Life of this patent

Abstract

Claims3