Synthesis and structure of potassium salts of 1,3,2-diazaboroles.
Cyclocondensation reaction of RNHCH:CHNHSiMe3 with MeBBr2 in the presence of BuLi in pentane/hexane gave dihydro-1,3,2-diazaboroles I (R = Me, Et, CHMe2, CMe3). Reaction of I with KOCMe3 in THF gave 60-70% title compds. II. The crystal structure of II contg. (Me3CO)- and (Me2SiO2)- anions was detd.
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