Subporphyrinato Boron(III) Hydrides

作者：Tsurumaki Eiji; Sung Jooyoung; Kim Dongho^*; Osuka Atsuhiro

来源：Journal of the American Chemical Society, 2015, 137(3): 1056-1059.

DOI：10.1021/ja5126269

Subporphyrinato boron(III) hydrides were prepared by reduction of subporphyrinato boron(III) methoxides with diisobutylaluminum hydride (DIBAL-H) in good yields. The authenticity of the B-H bond has been unambiguously confirmed by a H-1 NMR signal that appears as a broad quartet at -2.27 ppm with a large coupling constant with the central B-11, characteristic B-H infrared stretching frequencies, and single crystal X-ray diffraction analysis. Red shifts in the corresponding absorption and fluorescence profiles are accounted for in terms of the electron-donating nature of the B-hydride. The hydridic character of subporphyrinato boron(III) hydrides has been demonstrated by the production of H-2 via reaction with water or HCl, and controlled reductions of aromatic aldehydes and imines in the presence of a catalytic amount of Ph3C[B(C6F5)(4)].

• 出版日期2015-1-28