Process for preparing heterocycles

US6153752A · kind A · utility

Assignee

• CREANOVA AG · CH

Inventors

• Frank Bauer · Wyomissing, US
• Chitoor S. Subramaniam · East Brunswick Township, US

Key dates

• Filing date: Jan 28, 2000
• Grant date: Nov 28, 2000
• Expiry date: Jan 28, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D261/18
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for the preparation of heterocycles by reacting 2-substituted acetals of malondialdehyde with a reactant selected from hydroxylamines and their salts, hydrazines and their salts, formamid, amidines and their salts, guanidines and their salts, aminoguanidines and their salts, nitroguanidine and their salts, O-alkyl-isoureas and their salts, O-cycloalkyl-isoureas and their salts, O-aralkyl-isoureas and their salts, O-aryl-isoureas and their salts, S-alkyl-isothioureas, S-cycloalkyl-isothioureas, S-aralkyl-isothioureas, S-arylisothioureas, S-alkyl-isothiouronium salts, S-cycloalkyl-isothiouronium salts, S-aralkyl-isothiouronium salts, S-aryl-isothiuronium salts, thiourea and urea.