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Please login to access the full content or check if you have access via6.1.5.12.1 Method 1: Preparation of Boron Heterocycles Using Amino(dihalo)boranes
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Matteson, D. S., Science of Synthesis, (2005) 6, 227.
The major synthetic use of amino(dihalo)boranes is the preparation of a wide variety of exotic boron heterocycles. An example is the preparation of 2,5-dihydro-2,5-diphenylborole 142 from the appropriate organomagnesium precursor and a dichloro(dimethylamino)borane (10) (Scheme 56).[189] Lithiation of 141 yields the dianion 142, which was isolated and characterized as its TMEDA–lithium salt. A number of other 2,5-dihydroboroles have been prepared in an analogous manner.[190]
Meeeee 88 Meeeeeeee ee e 8,8-Meeeeee-8,8-eeeeeeeeeeeeee[888]
M-Meeeeeeeeee eeeeeee eeeeeeeeeee eee ee eeeeeeee eeee eeeeeeeeeee eeeeeeeeeeeeeeee eee eeeeeeee(eeeeeeeeeeeee)eeeeee.[888] Me eeeeeee ee eee eeeeeeeee ee eeeeeeeeeeeeeeeee 888 eeee 8,8-eeeeeeeeeeeee-8,8-eeeee eee eeeeeeee(eeeeeeeeeeeee)eeeeee (88) eee eee eeeeeeeeee eeee eee 8-(eeeeeeeeeeeee)-8,8-eeeeeeeeeeeeeee eeeee ee eee MMMMM–eeeeeee eeee 888 (Meeeee 88).
Meeeee 88 Meeeeeeee ee e Meeeeeeeeee Meeeeeeeee[888]
Meeeeee eeee ee eeeeeeeeeeee eeeeeeeee ee eeeeeeeeeee ee eee eeeeeeeee ee 8,8-eeeeeeeeeeeeeee 888 eeee eeeeeeeeeee 8-eeeeeeeeeeeeeeee eee eeeeeeee(eeeeeeeeeeeeeeee)eeeeee (88) (Meeeee 88).[888] Meeeeeeeeeeee ee eeee eeeee eeeeeeeeeee eeeeeee ee e eeeeeeeeeeeeeeeeeeeeee eeeeeeee eeee eeeee η8-eeeeeeeee eeee eeeeeeeeee eeeeee eeee ee eeeeeeeee eee eeeeeeeee.
Meeeee 88 Meeeeeeee ee e Meeeeeeeeeeeeee[888]
Meeeeeeeeeee Meeeeeeee
8-(Meeeeeeeeeeeeeee)-8,8-eeeeeee-8,8-eeeeeeeeeeeeeee (888):[888]
8.8 M MeMe ee eeeeee (88.8 eM, 888.8 eeee) eee eeeee eeeeeeee ee e eeee ee 8-eeeeeeeeeeeeeeee (8.88 e, 88.8 eeee) ee Me8M (888 eM) ee 8°M. Mee eeeeeeeee eeeeee eeee eee eeeeeee eee 88 eee ee 8°M eeeeeeee ee 88 e ee 88°M. Meee eeeeeee eee eeeee eeeeeeee eee e eeeeeee ee e eeee ee eeeeeeee(eeeeeeeeeeeeeeee)eeeeee (88; 8.88 e, 88.8 eeee) ee Me8M (888 eM) ee −88°M. Mee eeeeeee eee eeee eeeeeee eee 88 e ee 88°M. Mee eeee eee eeeeeeeeeeee eeeee eeeeee eee eee eeeeeee eee eeeeeeeee eeee eeeeeee (8 ×). Mee eeeeeeee eeeeeeee eeee eeeeeeee eee eeeeeeeee, eeeeee eee eeeeeee eeeee eeeeee e eeee eeeee ee eeeeeee; eeeee: 8.88 e (88%); ee 88–88°M/8.88 Meee.
References
[107] | Meee, M. M., MMM; Meeee, M.; Meeeeeee, M., Meeeeeeeeeeeeee, (8888) 88, 8888. |
[189] | Meeeeeeee, M. M.; Meeeee, M.; Meee, M.-M., M. Meeeeeeee. Meee., (8888) 888, 88. |
[190] | Meeeeeeee, M. M.; Meee, M.-M.; Meeeee, M., Meee. Mee., (8888) 888, 8888. |
[191] | Meeeeeeee, M. M.; Meeeeee, M.; Meeeeee, M. M.; Meeeee, M., Meeeeeeeeeeeeee, (8888) 88, 8888. |
[192] | Meee, M. M., MMM; Meeee, M. M.; Meeeeeeee, M., Meeeeeeeeeeeeee, (8888) 88, 8888. |
Meeeeee Meeeeeeeeee
- 8.Meeeee-Meee, (8888) 88/8e, 88.