The addition of AlCl 3 to four-coordinate boranes of the general formula (C−N-chelate)BCl 2 results in halide abstraction and formation of three-coordinate borenium cations of the general formula [(C−N-chelate)BCl] +. The latter react with both arylstannanes and arylsilanes by boro-destannylation and-desilylation, respectively, to form arylated boranes.… (More)
The addition of CO to [((R3N)BH2)2(μ-H)][B(C6F5)4] leads to formation of trimethylboroxine ((MeBO)3) and [(R3N)2BH2][B(C6F5)4]. When R = Et, [(Et3N)H2B(μ-O)B(CH3)NEt3][B(C6F5)4], is isolated and demonstrated to be an intermediate in the formation of (MeBO)3.
Experimental and theoretical rationalization on regioselective mixed diboration of alkenes, with the unsymmetrical diboron reagent Bpin-Bdan, providing the protecting Bdan moiety in the internal position.
A combination of in situ IR spectroscopy (ReactIR) and DFT calculations have been used to understand what factors govern the selectivity in the addition of primary amines to α,β-unsaturated aldehydes and ketones, i.e., 1,2- versus 1,4-addition. It has been found that the 1,2-addition products (α,β-unsaturated imines following addition and elimination)… (More)