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:
Oct. 24, 1978
Filed:
Apr. 19, 1977
Hideo Nagoshi, Yokohama, JP;
Susumu Kanno, Machida, JP;
Tadashi Oohama, Yokohama, JP;
Ryozo Yamaguchi, Yokohama, JP;
Mitsubishi Chemical Industries Limited, Tokyo, JP;
Abstract
17-Acetals of 3-alkoxyestra-2,5(10)-dien-17-ones are prepared by reacting 17-acetals of 3-alkoxyestra-1,3-5(10)-trien-17-ones with sodium or potassium, liquid ammonia and a tertiary alcohol in the presence of a solvent selected from the group consisting of tetrahydrofuran, dioxane and tetrahydropyran. Yield and selectivity of this reaction are improved by using the 17-acetals of the 3-alkoxyestra-1,3,5(10)-trien-17-ones, sodium or potassium, liquid ammonia and the solvent in such proportions that the 17-acetals of the 3-alkoxyestra-1,3,5(10)-trien-17-ones are substantially dissolved in the reaction system and that two liquid phases are formed, the lower phase being colored.