Catalytic method for producing phenolphthalein compounds

US7915430B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• Venkata Rama Narayanan Ganapathy Bhotla · Bengaluru, IN
• Shivappa Basappa Halligudi · Mangaon, IN
• Gurram Kishan · Bengaluru, IN
• Salkod Parameshwar Mallika · Bengaluru, IN
• Bhaskar Veldurthy · Savanuru, IN

Key dates

• Filing date: Sep 29, 2008
• Grant date: Mar 29, 2011
• Expiry date: Mar 3, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D307/885
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula:wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula:wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula:wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group, and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises a metal oxide composition in combination with a porous support, wherein the metal is molybdenum, tungsten, or a combination comprising at least one of the foregoing metals.