Synthesis of phosphine-borane complexes of P-heterocycles
Dihydro-1H-phosphole-boranes 5 and 10 were prepared from phosphine oxides 1 and 9 respectively. Reaction of borane 5 with dichlorocarbene gave dihydrophosphole-dichloromethylborane 6 and tetrahydro derivative 7a as the main products, and dichlorocyclopropane 8 as the minor component. Dichlorocarbene...
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Published in | Journal of organometallic chemistry Vol. 516; no. 1; pp. 139 - 145 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
LAUSANNE 1
Elsevier B.V
14.06.1996
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Dihydro-1H-phosphole-boranes
5 and
10 were prepared from phosphine oxides
1 and
9 respectively. Reaction of borane
5 with dichlorocarbene gave dihydrophosphole-dichloromethylborane
6 and tetrahydro derivative
7a as the main products, and dichlorocyclopropane
8 as the minor component. Dichlorocarbene addition reaction of boranes
10 did not afford the corresponding phosphabicyclohexanes, but the dichloromethylborane complexes of the dihydro- and tetrahydrophospholes (
11 and
7 respectively). Phosphabicyclohexaneborane
13 was synthesized from P-oxide
12 by change in the functionality. The dihydrophosphinine-boranes (
16) were prepared by cyclopropane ring opening of phosphabicyclohexane
13, or by change in the functionality of P-oxide
15. Reaction of dihydrophosphinine-boranes
17 with dichlorocarbene gave traces of dihydrophosphinine-dichloromethylborane
18 instead of the phosphepine. The phosphepine-borane (
20) was synthesised from oxide
19. The preparation of unsaturated phosphine-boranes was complicated by reduction side-reactions. The products were characterized by
31P,
11B,
1H and
13C NMR, as well as MS data. |
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ISSN: | 0022-328X 1872-8561 |
DOI: | 10.1016/0022-328X(96)06134-7 |