Pyrocatechol derivatives

US4129601A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl Kiehs · Lampertheim, DE
• Rolf Huber · Tübingen, DE

Key dates

• Filing date: Aug 2, 1976
• Grant date: Dec 12, 1978
• Expiry date: Aug 2, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C43/23
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

New and valuable pyrocatechol derivatives and a process for their preparation. The pyrocatechol derivatives have the formula ##STR1## wherein: R denotes alkyl of from 1 to 4 carbon atoms which may be substituted with halogen; alkenyl having up to 4 carbon atoms which may be substituted with halogen; alkynyl having up to 5 carbon atoms which may be substituted with halogen; or benzyl; PA1 R.sup.1 denotes hydrogen or alkyl of from 1 to 4 carbon atoms; PA1 R.sup.2 denotes benzyl or alkyl of from 1 to 3 carbon atoms which may be substituted with halogen, methoxy or ethoxy; PA1 R.sup.3 denotes alkyl of from 1 to 4 carbon atoms; cycloalkyl of from 3 to 7 carbon atoms; .beta.-chlorethyl; methoxyethyl; ethoxyethyl; alkenyl of from 2 to 4 carbon atoms; alkynyl of from 2 to 4 carbon atoms; acetyl; propionyl; PA1 R.sup.1 and R.sup.2 when taken together with the carbon atom to which they are attached form a cyclopentyl or cyclohexyl ring; and PA1 R.sup.1 and R.sup.3 when taken together with the carbon atom and oxygen atom to which they are attached form a tetrahydrofuranyl or tetrahydropyranyl ring. These compounds I are valuable starting materials for cleavage of the acetal structure to yield…