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Patent / Jan 01, 1973

Corticosteroid 21-sulfates and 21-phosphates

Authors:

Ivan Villax

Source:

GB 1395820

Diidopregnadienedione I (R = R1 = I) (II) was treated with Me2CO contg. K2HPO4 and H3PO4 or MeCN-Me2CO contg. Et3N.H3PO4 to give betamethasone phosphate (I; R = H, R1 = OPO3H2), which yielded 1:1 and 2:1 salts with PhCH2NHCH2CH2NHCH2Ph. Treatment of II with K2SO4 and H2SO4 yielded betamethasone sulfate (I, R = H, R1 = OSO3H).

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Knowledge Center

Corticosteroid 21-sulfates and 21-phosphates

Also in the Knowledge Center

Electrophilic reagents for monohalomethylation, their preparation and their uses

Continuous production of particles, micro- and/or nanoparticles, particulate amorphous solid dispersions, particulate co-crystals and pharmaceutical compns.

Dry-Powder Inhalation Formulation: Balancing Performance and Manufacturability

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