METHOD FOR PREPARING 9-BORABICYCLO[3,3,1]NONANE Russian patent published in 2005 - IPC

FIELD: chemical technology.

SUBSTANCE: invention relates to technology for preparing organoboron compounds, in particular, to the improved method for preparing 9-borabicyclo[3.3.1]nonane. Method for preparing 9-borabicyclo[3.3.1]nonane is carried out by interaction of diborane with 1,5-cyclooctadiene in 1,4-dioxane medium at simultaneous feeding diborane and 1,5-cyclooctadiene at the rate necessary for maintaining the molar ratio 1,5-cyclooctadiene : diborane = (1.9-2.04):1.0, respectively, during all through reaction. The process is carried out in the volume ratio 1,4-dioxane : 1,5-cyclooctadiene = (2.2-4.0):1.0 and at temperature 11-25°C. In preparing 9-borabicyclo[3.3.1]nonane the reaction mass is kept at temperature 65-102°C. The invention provides simplifying technology in preparing 9-borabicyclo[3.3.1]nonane due to exclusion the preliminary preparing borane complex and additional recrystallization of 9-borabicyclo[3.3.1]nonane, enhancing yield of the end product up to 91.0-93.5% of the high quality (the content of basic substance is 99.1-99.9%, melting point is 152-156°C), and possibility for creating the wasteless manufacturing. Method for preparing 9-borabicyclo[3.3.1]nonane shows technological simplicity in its realization and economy profit in its realization in industrial scale.

EFFECT: improved preparing method.

4 cl, 4 ex