The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1992
Filed:
Aug. 23, 1991
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
A new process for the preparation of 1-chloro-2-(1-chloro-cyclopropyl)-3-(2-chloro-phenyl)-propan-2-ol of the formula ##STR1## and/or 2-(1-chloro-cyclopropyl)-2-(2-chloro-benzyl)-oxirane of the formula ##STR2## comprising a) reacting in a first step, 2-chloro-benzyl chloride of the formula ##STR3## with comminuted magnesium in the presence of a mixture of toluene and tetrahydrofuran, in which the ratio of toluene to tetrahydrofuran is between 65:35 and 95:5 parts by weight, at a temperature between 0.degree. C. and 100.degree. C., the ratio of 2-chloro-benzyl chloride to tetrahydrofuran being such that between 1 and 3 moles of tetrahydrofuran are present per mol of 2-chloro-benzyl chloride, and subsequently separating off any magnesium which may still be present, and