Synthesis and NMR properties of derivatives of 5,6-dihydroborauracil and 5,6-dihydroborathymine
摘要:
Novel boron compounds, a series of 4-hydroxy-5,6-dihydroborauracil and 4-hydroxy-5,6-dihydroborathymine derivatives containing various substituents at 3-, 5-and 6-positions, is presented. The spectroscopic properties, along with analyses of NMR-controlled boron compound-alcohol and boron compound-amine interactions, proves the existence of sp(3)-hybridized, stable B, B-bis-methoxy-5,6-dihydroborauracils and pyridine-/n-butylamine-5,6-dihydroborauracils ate-complexes in solution. (C) 2009 Elsevier Inc. All rights reserved.
Bis(silyl)enamines or silylaziridines from the thermal reactions of azides with alkenylsilanes
作者:Alan R. Bassindale、Adrian G. Brook、Peter F. Jones、James A.G. Stewart
DOI:10.1016/s0022-328x(00)91930-2
日期:1978.5
When vinylsilanes and other alkenylsilanes react with silylazides the products were found to be bis(silyl)enamines, presumably arising from thermal rearrangement of intermediate triazolines. Other azides react with alkenylsilanes to give triazolines, which fail to rearrange to silylenamines, but which instead yield silylaziridines.