Reaktion von konjugierten doppelbindungsystemen mit dihalogen(diorganylamino)boranen und Na/K-legierung
作者:Walter Maringgele、Sven Dielkus、Regine Herbst-Irmer、H. Michaelsen、Anton Meller
DOI:10.1016/0022-328x(94)80144-4
日期:1994.5
The reaction of 2,3-dimethylbuta-1,3-diene or 2-methylbuta-1,3-diene with Na/K-alloy and dichloro(diisopropylamino)borane in n-hexane yielded the 1-bora-cyclopent-3-enes, A and II, and 1-bora-cyclonona-1,3-diene, I, respectively. Cycloocta-3,7-diene reacts with dihalogeno(diorganylamino)boranes and Na/K-alloy in n-hexane to yield the 9-bora-bicyclo[4,2,1]non-7-enes III, V, VI and the 1,6-bis(diorganylaminofluoroboryl)-cyclooct-7-enes IV and VII. When 1,2-dimethoxyethane was the solvent, only the dimeric cyclooctene, C, was obtained. The compounds were characterized by elemental analyses and spectroscopy [MS; NMR (H-1, B-11, C-13, F-19)]. An X-Tay analysis is presented for I, MNDO-calculations have been carried out for III and III*.