METHOD OF PREPARING 21-ALKYLATED PREGNA-1,4,16-TRIEN-3,20-DIONES - Patent 0882062

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EP 0 882 062 A1

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(43)	Date of publication:
	09.12.1998 Bulletin 1998/50

(21)	Application number: 97911920.0

(22)	Date of filing: 22.10.1997

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International Patent Classification (IPC):

C07J 13/ 00^{( . )}
C07J 71/ 00^{( . )}

C07J 51/ 00^{( . )}

(86)	International application number:
	PCT/US1997/019276

(87)	International publication number:
	WO 1998/018813 (07.05.1998 Gazette 1998/18)

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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Priority:

25.10.1996 US 19960029312P

(71)	Applicant: ALCON LABORATORIES, INC.
	Fort Worth Texas 76134-2099 (US)

(72)	Inventor:
	CONROW, Raymond, E. Crowley, TX 76036 (US)

(74)	Representative: Keller, Günter, Dr., et al
	Lederer, Keller & Riederer Patentanwälte Prinzregentenstrasse 16 80538 München 80538 München (DE)

(54)	METHOD OF PREPARING 21-ALKYLATED PREGNA-1,4,16-TRIEN-3,20-DIONES