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welcome back Im Matt chemist and today we have five important papers in organic synthesis for the month of December 2022 the first paper for today is a very important paper involving the Halo boration of carbonyls some highlights of this paper include the conversion of aldehydes and ketones into Alpha Halo boronates this involves the removal of the oxygen and the installation of both the halogen atom as well as a b-pin group this is a two-step one pot process that features an excellent scope additionally the authors demonstrated that in antioselective conditions were possible now while this paper lacked an investigation into the mechanism I would propose the following first B2 pin 2 is able to be installed under catalytic conditions with copper this affords this Alpha B pin boronate then once a TMS halide is added the TMS group is able to coordinate to the oxygen of the boronate and this would make this into a better leaving group and then the halide could displace this as a leaving
