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Expired
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GB6010/59A
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GOBEY LAB
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GOBEY LAB
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Publication of GB887664ApublicationCriticalpatent/GB887664A/en
C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
C07D471/04—Ortho-condensed systems
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Nitrogen Condensed Heterocyclic Rings
(AREA)
Abstract
The invention comprises yohimbinone of the formula <FORM:0887664/IV (b)/1> and a process for its preparation by reacting yohimbine or b -yohimbine with an aromatic ketone, particularly 9-fluorenone, in the presence of an alkali metal alcoholate of a tertiary alcohol, especially potassium t-butylate. The reaction is preferably carried out by refluxing the reactants in benzene. Detailed examples are given.
GB6010/59A1958-02-261959-02-20Improvements in or relating to yohimbane compounds
ExpiredGB887664A
(en)
Procedure for the preparation of new products of sulfonilarilurea and its employment as agents to combat the bad herbs. (Machine-translation by Google Translate, not legally binding)