[EN] METHYLAMINE DERIVATIVES AS LYSYSL OXIDASE INHIBITORS FOR THE TREATMENT OF CANCER [FR] DÉRIVÉS DE LA MÉTHYLAMINE COMME INHIBITEURS DE LA LYSYL OXIDASE POUR LE TRAITEMENT DU CANCER
Elucidation of the Formation Mechanisms of the Octahydrotriborate Anion (B<sub>3</sub>H<sub>8</sub><sup>–</sup>) through the Nucleophilicity of the B–H Bond
which H2 elimination occurs to yield the B3H8- final product. The formation of B2H6 from THF·BH3 by nucleophilic substitution of the B-H bond was captured and identified, and the reaction of B2H6 with BH4- to produce B3H8- was confirmed experimentally. On the bases of the formation mechanisms of B3H8-, we have developed a facilesynthetic method for MB3H8 (M = Li and Na) in high yields by directly reacting
Iron-Catalyzed 1,2-Selective Hydroboration of <i>N</i>-Heteroarenes
作者:Fanjun Zhang、Heng Song、Xuewen Zhuang、Chen-Ho Tung、Wenguang Wang
DOI:10.1021/jacs.7b11416
日期:2017.12.13
A N2-bridged diiron complex [Cp*(Ph2PC6H4S)Fe]2(μ-N2) (1) has been found to catalyze the hydroboration of N-heteroarenes with pinacolborane, giving N-borylated 1,2-reduced products with high regioselectivity. The catalysis is initiated by coordination of N-heteroarenes to the iron center, while the B-H bond cleavage is the rate-determining step.
Organoboron compounds are powerful precursors of value-added organic compounds in synthetic chemistry, and transition metal-catalysed borylation has always been dominant. To avoid toxic reagents and costs associated with metal catalysts, simpler, more economical and effective approaches for delivering organoborons are highly desirable. Here, without the use of any metal catalysts, a CH3CN-involved
Thioether-Directed NiH-Catalyzed Remote γ-C(sp<sup>3</sup>)–H Hydroamidation of Alkenes by 1,4,2-Dioxazol-5-ones
作者:Bingnan Du、Yuxin Ouyang、Qishu Chen、Wing-Yiu Yu
DOI:10.1021/jacs.1c05834
日期:2021.9.22
amidation of unactivated alkenes. Due to the preference for five-membered nickelacycle formation, the chain-walking isomerization initiated by the NiH insertion to an alkene can be terminated at the γ-methylene site remote from the alkene moiety. By employing 2,9-dibutyl-1,10-phenanthroline (L4) as the ligand and dioxazolones as the reagent, the amidation occurs at the γ-C(sp3)–H bonds to afford the amide
Microwave spectrum and molecular structure of aminoborane, BH2NH2
作者:Masaaki Sugie、Harutoshi Takeo、Chi Matsumura
DOI:10.1016/0022-2852(87)90279-7
日期:1987.6
Abstract The microwave spectra of five isotopic species of aminoborane have been observed. The rotational constants, centrifugal distortion constants, and nuclear quadrupole coupling constants of 11B and 14N were determined from the spectra. The planarity and symmetry of the molecule were confirmed by the measurements of inertia defects, dipole components, and statistical spin weight due to the four
摘要 观测了五种氨基硼烷同位素的微波光谱。11B 和 14N 的旋转常数、离心畸变常数和核四极耦合常数由光谱确定。分子的平面性和对称性通过惯性缺陷、偶极子分量和由于四个氢核引起的统计自旋重量的测量得到证实。由旋转常数确定的完整 rs 结构为: r (BN) = 1.391(2) A , r (BH) = 1.195(4) A , r (NH) = 1.004(2) A , ∠HBH = 122.2(2) )°,且 ∠HNH = 114.2(2)°。