FIELD: organic synthesis. SUBSTANCE: preparation of 9R-symm-octahydroselenoxanthenes by reaction of 4-R-2,3-tetramethylene[3.3.1]bicyclononane-3-ol-9-ones with hydrogen selenide under acid catalysis conditions is characterized by that hydrogen selenide is obtained in situ by dissolving zinc selenide in reaction milieu and that reaction is carried out in one step in presence of phosphorous acid esters, which are prepared by dissolving phosphorous trichloride in methanol simultaneously providing required concentration of hydrogen chloride in solution. EFFECT: simplified procedure and improved its safety. 3 ex
Title | Year | Author | Number |
---|---|---|---|
METHOD FOR OBTAINING 1,3-DI(4-R-PHENYLSELENO)ADAMANTANES | 2007 |
|
RU2333214C1 |
METHOD FOR PREPARING 4H-THIOPYRANES | 2001 |
|
RU2226192C2 |
METHOD FOR PREPARATION OF 2,4,6-TRIARYLSELENIUM PYRYLIUM CHLOROZINCATES | 2007 |
|
RU2367658C2 |
METHOD FOR PREPARING SUBSTITUTED SELENOPYRANES | 2003 |
|
RU2239632C1 |
METHOD FOR PREPARING SELENOPYRILIUM SALTS | 2004 |
|
RU2276150C2 |
METHOD OF SELENOPYRILIUM SALTS SYNTHESIS | 0 |
|
SU1816762A1 |
METHOD FOR OBTAINING 4H-SELENOPYRILIUM SALTS | 2021 |
|
RU2779983C1 |
METHOD FOR PREPARING DIMETHYL PHOSPHITE | 2004 |
|
RU2261864C1 |
ACIDIC PHOSPHOROUS CONTAINING COMPLEX FORMING REAGENT AND METHOD OF OBTAINING IT (VERSIONS) | 2007 |
|
RU2331651C1 |
METHOD FOR PRODUCTION OF OXYETHYLIDENEDIPHOSPHONIC ACID FROM HIGHER FATTY ACID HALIDE PRODUCTION WASTE | 2000 |
|
RU2178793C1 |
Authors
Dates
2004-01-20—Published
2002-05-31—Filed