Direct introduction of a naphthalene-1,8-diamino boryl [B(dan)] group by a Pd-catalysed selective boryl transfer reaction
作者:Liang Xu、Pengfei Li
DOI:10.1039/c5cc00231a
日期:——
reagent, B(pin)-B(dan), has been utilised in the Pd-catalysed borylation of aryl bromides and chlorides. Remarkably selective formation of aryl-B(dan) bonds is established. This represents a direct and efficient way to introduce masked boronic acids. The synthetic usefulness of this reaction is demonstrated in the preparation of boron-differentiated di- and polyboron compounds.
A direct metal-freetransformation from arylamines to aryl naphthalene-1,8-diamino boronamides, a type of masked boronic acid, has been developed based on Sandmeyer-type reactions. A nonsymmetrical diboron reagent, B(pin)-B(dan), was utilized as the borylating reagent, and the B(dan) moiety was transferred to the aim products selectively. This conversion tolerated a series of functional groups, including
Efficient one-pot synthesis of dan-substituted organo- and silyl-boron compounds
作者:Kazuki Tomota、Yuki Izumi、Kazuki Nakanishi、Masaaki Nakamoto、Hiroto Yoshida
DOI:10.1039/d3ob00613a
日期:——
B(dan)-installation into organic frameworks has been developed. Heteroaryl–H bonds were transformable into the respective heteroaryl–B(dan) bonds through deprotonation. The resulting heteroaryl–B(dan) compounds, which are otherwise difficult to access, can undergo the direct Suzuki–Miyaura coupling. The method was demonstrated to apply to a silicon nucleophile, giving Lewis acidity-diminished stable silyl–B(dan)