Synthesis of cyclic compounds

US6958145B2 · kind B2 · utility

Assignee

• Unisearch Limited · AU

Inventors

• Naresh Kumar · Barwala, IN
• Roger Read · Sydney, AU

Key dates

• Filing date: Jun 28, 2001
• Grant date: Oct 25, 2005
• Expiry date: Jan 2, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F224/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for the preparation of a compound of formula (II) wherein R1 and R2 are independently H, alkyl, alkoxy, oxoalkyl, alkenyl, aryl or arylalkyl whether unsubstituted or substituted, optionally interrupted by one or more hetero atoms, straight chain or branched chain, hydrophilic, hydrophobic or fluorophilic; R3, R4, R5 and R6 are independently or all hydrogen or halogen; provided that at least two of the R3, R4, R5 and R6 are halogens.