Biphenydiols

US6844462B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Birgit Drieben-Holscher · Aachen, DE
• Joachim Kralik · Hanau, DE
• Inga Ritzkopf · Aachen, DE
• Christian Steffens
• Guido Giffels · Bonn, DE
• Claus Dreisbach
• Thomas Prinz · Neunburg vorm Wald, DE

Key dates

• Filing date: Apr 7, 2003
• Grant date: Jan 18, 2005
• Expiry date: Apr 7, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/827
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the biphenyldiols of the formula (V) The corresponding racemic and enantiomerically pure triflate compounds thereof, where R1 and R2 are H, R3 is chlorine, and R4 is methoxy.In an alternate embodiment, R1 and R2 are hydrogen and R3 and R4 are C1-C4-alkoxy, fluorine, or chlorine.