ISSN:
0009-2940
Keywords:
Borolanes
;
Boroles, 2,5-dihydro
;
3,7-Diborabicyclo[3.3.0]oct-1(5)-enes
;
2,5-Diborapentalenes, 1,2,3,4,5,6-hexahydro-
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
3,4-Dimethyleneborolanes and 3,7-Diborabicyclo[3.3.0]oct-1(5)-enesThe tetramethyleneethane derivative K2[C2(CH2)4] which is readily prepared from 2,3-dimethylbutadiene by metallation with the Lochmann-Schlosser base reacts with BC12(NR2) (R=Me, Et, iPr) to give the highly reactive, liquid 1-(dialkylamino)-3,4-dimethyleneborolanes (3). These dienes react with activated magnesium to give soluble magnesium adducts 5 which upon treatment with BC12(NR2) (R = Me, iPr) yield crystalline 3,7-bis(dialkylamino)-3,7-diborabicyclo-[3.3.0]oct-1(5)-enes (4). The crystal structure of the dimethyl-amino compound 4a was determined by X-Ray-diffraction. The molecule of 4a shows crystallographic C2h symmetry with an almost perfectly planar skeleton.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19941270611
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