Optically active hydantoins

US5068341A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Eike Poetsch · Mühltal, DE
• Michael Casutt · Pfungstadt, DE

Key dates

• Filing date: Sep 5, 1989
• Grant date: Nov 26, 1991
• Expiry date: Sep 5, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D513/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Optically active hydantoins of the formula I ##STR1## wherein X, Y, R.sup.1, R.sup.2 and R.sup.3 have the meaning given in Patent claim 1, are useful intermediate products for the preparation of D-(+)-biotin.