US 4,904,823 A · Hydroquinone derivatives and a process for their preparation

Abstract

There is described a process for the manufacture of hydroquinone derivatives of the formulae ##STR1## which are valuable intermediates in the synthesis of natural vitamin E.

Claims1

Dependent claims

Compounds of the general formula ##STR18## wherein R represents an ether protecting group.

Dependencies are inferred from the claim text.

Facts

Application

07/299,588Filed 23 Jan 1989 · division

Priority

CH 4117/8428 Aug 1984

Granted

27 Feb 1990

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

C07F 7/28
Compounds containing elements of Groups 4 or 14 of the Periodic Table: titanium compounds
C07C 43/23
Having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring: containing hydroxy or O-metal groups
C07C 51/347
Preparation of carboxylic acids or their salts, halides or anhydrides: by reactions not involving formation of carboxyl groups
C07C 59/64
Containing ether groups, [IMAGE cpc-sch-C07C-0958.gif] groups,[IMAGE cpc-sch-C07C-0959.gif] groups, or[IMAGE cpc-sch-C07C-0960.gif] groups:…

Family

Serial768,789Parent of this division · filed 23 Aug 1985

Serial22,303Parent of this division · filed 5 Mar 1987

Serial145,166Parent of this division · filed 19 Jan 1988

US 4,743,696 AParent of this division

US 4,675,421 AParent of this division

US 4,904,823 AThis patent

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

Abstract

There is described a process for the manufacture of hydroquinone derivatives of the formulae ##STR1## which are valuable intermediates in the synthesis of natural vitamin E.

Hydroquinone derivatives and a process for their preparation

Life of this patent

Abstract

Claims1

Hydroquinone derivatives and a process for their preparation

Life of this patent

Abstract

Claims1