Site-Selective and Stereoselective trans-Hydroboration of 1,3-Enynes Catalyzed by 1,4-Azaborine-Based Phosphine–Pd Complex Article Swipe
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Senmiao Xu
,
Yuanzhe Zhang
,
Bo Li
,
Shih‐Yuan Liu
·
YOU?
·
· 2016
· Open Access
·
· DOI: https://doi.org/10.1021/jacs.6b09759
· OA: W2536379099
YOU?
·
· 2016
· Open Access
·
· DOI: https://doi.org/10.1021/jacs.6b09759
· OA: W2536379099
A concise synthesis of monobenzofused 1,4-azaborine phosphine ligands (Senphos) is described. These Senphos ligands uniquely support Pd-catalyzed trans-selective hydroboration of terminal and internal 1,3-enynes to furnish corresponding dienylboronates in high efficiency and diastereoselectivity. X-ray structural analysis of the Senphos-Pd(0) complex reveals a κ<sup>2</sup>-P-η<sup>2</sup>-BC coordination mode, and this isolated complex has been shown to serve as a competent catalyst for the trans-hydroboration reaction. This work demonstrates that the expanded chemical space provided by the BN/CC isosterism approach translates into the functional space in the context of stereoselective catalytic transformations.
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