Suzuki-Miyaura cross-coupling pinacolborane

Catalytic hydroboration of alkenes and alkynes can be achieved by the reaction of dialkoxyboranes such as pinacolborane 55 and catecholborane 56 in the presence of transition metal catalysts such as CpjZrHCl, Rh(PPh3)3Cl, or Rh(PPh3)2COCl, (Scheme 28.14). This reaction is of particular significance because it readily provides alkyl/vinylboronates directly in one step for further utility in Suzuki-Miyaura cross-coupling reaction. 

Suzuki-Miyaura Cross Coupling. Arylboronates are valuable reagents in organic synthesis owing to their widespread use in Suzuki-Miyaura cross coupling reactions. Pinacolborane is extensively used in the horylation of aryl halides in the presence of a base (typically pyridine, EtsN, or KOAc) and a catalytic amount of PdCl2(dppf) affording arylboronates (eq 16). 

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