已经测量了从广泛的路易斯碱硼烷加合物中置换 BH 3的奎宁环动力学。这些速率的参数化使得能够开发出离核量表 (NF B ),以量化和预测一系列其他路易斯碱基的离去基团能力。在多个系列 R' 3– n R n X (X = P, N; R' = 芳基, 烷基) 中观察到的可加性允许制定相关的取代基参数 ( n f PB , n f AB ),提供了一种方法计算N F B一系列路易斯碱基的值远远超出了实验得出的值。通过取代基参数n f PB与一系列烷基和芳基 MIDA 硼酸盐在中性条件下的水解速率的相关性,探索了核离性参数的效用。这允许鉴定具有接近反应中心的杂原子的 MIDA 硼酸盐,显示出不寻常的动力学不稳定性或水解稳定性。
While numerous organo(metallic)catalyst systems were documented for dearomative hydroboration of N‐aromatics, alkoxide base catalysts have not been disclosed thus far. Described herein is the first example of alkoxide‐catalyzed hydroboration of N‐heteroaromatics including pyridines, providing a broad range of reduced N‐heterocycles with high efficiency and selectivity. Mechanistic studies revealed
Boron-11 chemical shifts in the determination of donor-acceptor strengths—VII
作者:E.F. Mooney、M.A. Qaseem
DOI:10.1016/0022-1902(68)80283-0
日期:1968.7
The 1H and 11B spectra of a series of pyridine- and substituted pyridine-borane and phenylborane (Py, BH3 and Py, PhBH2) complexes have been measured. The 14N chemicalshifts of pyridine, 2-, 3- and 4-methyl and 4-ethyl-pyridines and the borane complexes and the hydrochlorides have also been determined.
Amine Boranes. III. Propanolysis of Pyridine Boranes
作者:G. E. Ryschkewitsch、E. R. Birnbaum
DOI:10.1021/ic50026a029
日期:1965.4
Steric Effects in Displacement Reactions. XI. The Heats of Reaction of Diborane with Pyridine Bases. Steric Strains in Homomorphs of o-t-Butyltoluene and Hemimellitene<sup>1</sup>