US 4,227,022 AGranted

Acetylenic diols and monoethers thereof

AssigneeHoffmann-La Roche Inc.

InventorMichael Rosenberger

Life of this patent

Estimating the term…

A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.

Dependent claims

The compound of the formula:

##STR25## wherein R.sub.1 is hydrogen, alpha-lower alkoxy-lower alkyl, tetrahydropyranyl, benzyl, benzhydryl, t-butyl or 4-methyl-5,6-dihydro-2H-pyranyl.

Dependencies are inferred from the claim text.

C07C 403/24
Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four…:…
C07C 41/54
By reactions producing [IMAGE cpc-sch-C07C-0958.gif] groups: by addition of compounds to unsaturated carbon-to-carbon bonds
C07C 45/513
Involving transformation of singly bound oxygen functional groups to >C = O groups: the singly bound functional group being an etherified hydroxyl…
C07C 403/04
Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four…:…

From the US filing history. Foreign family members aren’t listed.

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Facts

Application

05/949,849Filed 10 Oct 1978 · division

Priority

9 Jun 1975

Granted

7 Oct 1980

Term ends

Not estimatedThe source records don’t support an estimate.

C07C 403/24
Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four…:…
C07C 41/54
By reactions producing [IMAGE cpc-sch-C07C-0958.gif] groups: by addition of compounds to unsaturated carbon-to-carbon bonds
C07C 45/513
Involving transformation of singly bound oxygen functional groups to >C = O groups: the singly bound functional group being an etherified hydroxyl…
C07C 403/04
Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four…:…

Family

Serial585,224Parent of this division · filed 9 Jun 1975

Serial723,411Parent of this division · filed 15 Sep 1976

Serial791,678Parent of this division · filed 28 Apr 1977

US 4,045,476 AParent of this division

US 4,000,198 AParent of this division

US 4,227,022 AThis patent

From the US filing history. Foreign family members aren’t listed.