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REICHSTEIN TADEUS
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REICHSTEIN TADEUS
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Priority to ES0228541ApriorityCriticalpatent/ES228541A2/en
Publication of ES228541A2publicationCriticalpatent/ES228541A2/en
Improvements in the process for obtaining oxygenated steroids object of the main patent with a free or functionally derived oxyacetyl residue at position 17 characterized in that Δ4 -3 20-dioxo-pregnanes are reacted with the following partial formula of ring C C-C = X C-II 13 where X means an oxo group or the grouping H Oh or their functional derivatives with an oxalic acid ester, the obtained 21-oxalic acid esters are treated in the form of their enolic salts with a halogen, the obtained 21-halogen-21-oxalic acid esters are subjected to acid dissociation and the 21 -halogenides obtained are transformed into the 21-esters or 21-oxy compounds. (Machine-translation by Google Translate, not legally binding)
ES0228541A1956-05-171956-05-17Improvement for the obtaining of oxygenated steroids (Machine-translation by Google Translate, not legally binding)
ExpiredES228541A2
(en)
Procedure for the obtaining of therapeutically very valuable esters of the carboxylic acid of 17-alkyl-19-nor-testosterone (Machine-translation by Google Translate, not legally binding)
Procedure for obtaining esters of strictly progressive activity of the carboxylic acid of 1-alopregnene-17 a-o1-3,20-diona (Machine-translation by Google Translate, not legally binding)
Procedure for the obtaining of progestativally active energy esters of the carboxylicode acid the pregnadine-17 alfaol-3,20-diona (Machine-translation by Google Translate, not legally binding)
Procedure for the obtaining of alpha-gamma-dioxy-amidas of organic acid substituted or not replaced (Machine-translation by Google Translate, not legally binding)