Abstract:Auf dem Gebiet der Konzeptionsverhutung ist das 17~-Athinyl-ostradiol bzw. dessen 3-Methylather 3 (Mestranol) zum wichtigsten peroralen Ostrogen geworden. Es ist interessant, festzustellen, dalj das von Znhofen und HohZweg1) vor einigen Jahrzehnten hergestellte 17c~-Athinyl-Ostradiol als Zwischenprodukt fur die Synthese der im Titel genannten Verbindung l a (in unveratherter Form) vorgesehen war. a: R = H; b: R = CH3
“…Now there comes the end of the story. My colleague Professor Rudolf Wiechert at Schering later made Hohlweg's estradiol-17carboxylic acid, clearly with some effort, [64] and it is completely inactive as an estrogen.…”
“…Now there comes the end of the story. My colleague Professor Rudolf Wiechert at Schering later made Hohlweg's estradiol-17carboxylic acid, clearly with some effort, [64] and it is completely inactive as an estrogen.…”
Durch Enolacetylierung des racemischen D‐Homosteroidketons (I) und an ‐ schließende Bromierung entsteht das α‐Bromid (II), das in das Pyridiniumsalz (III) übergeführt wird.
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