Process for alkynylating 16-substituted-17-keto steroids

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United States of America Patent

PATENT NO 9296780
APP PUB NO 20150005518A1
SERIAL NO

14367886

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Abstract

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A process ethynylates 16-methylene-17-keto steroids to the corresponding 16-methylene-17α-ethynyl-17β-hydroxy steroids by treatment with silyl-protected lithium acetylides followed by further desilylation. The resulting products are useful intermediates in the preparation of several pharmaceutically active agents, such as e.g. Nestorone® or melengestrol acetate.

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CURIA SPAIN S A UPARQUE TECNOLOGICO DE BOECILLO PARCELA 105A BOECILLO E-47151

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gutiérrez, Fuentes Luis Gerardo Boecillo-Valladolid, ES 5 15
Sandoval, Rodriguez Celso Miguel Boecillo-Valladolid, ES 2 12

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