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US 3,939,202 AGranted
Process for preparing polyene compounds
AssigneeTeikoku Chemical Industry Co., Ltd.
InventorsMasanao Matsui, Seiichi Kitamura, Masahiro Morioka
Life of this patent
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Abstract
Polyene compounds of the formula: ##EQU1## wherein R' is protected or unprotected hydroxyl or a group of the formula: ##EQU2## (in which R" and R"' are each carboxyl or a group convertible into carboxyl on hydrolysis), m is a positive integer and n is 0 or a positive integer, which are useful as intermediates in the synthesis of coenzyme Q, can be produced advantageously through a step for the dehydration of a compound of the formula: ##EQU3## wherein R', m and n are each as defined above.
Claims9
A process for preparing a polyene compound which comprises:
- A. reacting a compound of the formula ##EQU12## with a compound of the formula ##EQU13## to form a compound of the formula ##EQU14## B. subjecting the product of (A) to hydrolysis and decarboxylation to form a compound of the formula ##EQU15## C. reducing the product of (B) to form a compound of the formula ##EQU16## D. reacting the product of (C) with a dehydrating agent to form a compound of the formula ##EQU17## where in each occurence above R is a group convertible into carboxyl on hydrolysis, R' is protected or unprotected hydroxyl or a group of the formula ##EQU18## where R" and R'" are each carboxyl or a group convertible into carboxyl on hydrolysis, X is the residue of an acid, m is a positive integer and n is O or a positive integer.
Dependencies are inferred from the claim text.