Alkoxyberyllium tetrahydroborates: t-butoxyberyllium pentane-2,4-dionate and complexes of t-butoxyberyllium oxide
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 13,p. 1440-1444
- https://doi.org/10.1039/dt9740001440
Abstract
The tetrahydroborates Me2EtCOBeBH4 and Et3COBeBH4 are dimeric in contrast to monomeric (BH4)2Be3(OBut)4. t-Butoxyberyllium tetrahydroborate is unreactive to olefins and does not reduce acetone or benzophenone in toluene, but reduces benzophenone in ether. With acetone and tetrahydrofuran, the oxide, {ButOBe(thf)}2O, is formed, and pyridine gives {ButOBe(py)}2O. The pentane-2,4-dionato-complex, {ButOBe(C5H5O2)}2, is formed from the diketone and either ButOBeBH4 or ButOBeMe. Reaction of pentane-2,4-dione with t-butoxy-beryllium tetrahydroborate appears to proceed by two competing paths, one leading to the pentane-2,4-dionate mentioned above and the other to reduction of the dione giving 4,6-dimethyl-1,3,2-dioxaborinan, which was also synthesised from diborane and either pentane-2,4-dione or pentane-2,4-diol.Keywords
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