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Bernd Erhart

Bayer HealthCare Pharmaceuticals

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Featured researches published by Bernd Erhart.

Tetrahedron | 1994

Synthesis of 13-ethyl-11-methylene-18,19-dinor-17α-pregn-4-en-20-yn-17-ol (desogestrel) and its main metabolite 3-oxo desogestrel

S. Schwarz; Sven Ring; Gisela Weber; Gerhard Teichmüller; Hans-Joachim Palme; Carmen Pfeiffer; Bernd Undeutsch; Bernd Erhart; Detlef Grawe

Abstract A synthesis of the steroid hormone desogestrel (25) from the 18a-homo steroid 1 is described. 25 was transformed into 3-oxo desogestrel (28) by allyl oxidation.

Archive | 1994

Steroid intermediate products and method of their production

Sven Ring; Gerhard Teichmueller; Gisela Weber; Sigfrid Schwarz; Bernd Erhart; Bernd Undeutsch; Harald Raethe; Peter Moellmann; Carmen Pfeiffer; Hans-Joachim Palme

Archive | 2000

Preparation of estradienyl-benzaldoxime derivative preparation in high yield, for use e.g. in treating endometriosis, from estradienone by multi-stage process including selective Grignard reaction

Gerd Schubert; Sven Ring; Bernd Erhart; Gerd Mueller

Archive | 2001

Method for the production of 4-(17

Gerd Schubert; Sven Ring; Bernd Erhart; Gerd Mueller

Archive | 2013

g(a)-methyl substituted 3-oxoestra-4 9-dien-11

Detlef Grawe; Sabine Gliesing; Hagen Gerecke; Peter Hoesel; Uwe Mueller; Thomas Michel; Robert Eilers; Uwe Knabe; Bernd Erhart; Michael Mosebach; David Voigtlaender; Ulf Tilstam; Jurgen Jacke; Klaus Bahl; Ulf Bohlmann; Dieter Wehmeier; Michael Sander

Archive | 2007

g(b)-yl)benzaldehyd-(1e or 1z)-oximes

Detlef Grawe; Sabine Gliesing; Hagen Gerecke; Peter Hoesel; Uwe Mueller; Thomas Michel; Robert Eilers; Uwe Knabe; Bernd Erhart; Michael Mosebach; David Voigtlaender; Ulf Tilstam; Juergen Jacke; Klaus Bahl; Ulf Bohlmann; Dieter Wehmeier; Michael Sander

Archive | 2006

4-[17BETA-METHOXY-17ALPHA-METHOXYMETHYL-3-OXOESTRA-4,9-DIEN-11-BETA-YL]BENZALDEHYDE (E)-OXIME (ASOPRISNIL)

Klaus Bahl; Ulf Bohlmann; Robert Eilers; Bernd Erhart; Hagen Gerecke; Sabine Gliesing; Detlef Grawe; Peter Hoesel; Juergen Jacke; Uwe Knabe; Thomas Michel; Michael Mosebach; Uwe Mueller; Ernst Sander; Ulf Tilstam; David Voigtlaender; Dieter Wehmeier

Archive | 2001