B-Methyl Amine Borane Derivatives: Synthesis, Characterization, and Hydrogen Release
作者:Patrick G. Campbell、Jacob S. A. Ishibashi、Lev N. Zakharov、Shih-Yuan Liu
DOI:10.1071/ch13198
日期:——
with 6.8 wt-% and 8.9 wt-% capacity, respectively. Compounds 3 and 4 readily release 2 equivalents of H2 at 80°C in the presence of a CoCl2 catalyst to furnish the corresponding trimerized borazine derivatives. Regeneration of 3 from its spent fuel material can be accomplished using a simple two-step process: activation with formic acid followed by reduction with LiAlH4.
[(Me3B3N3H2)Li(pmdta)] (2c) is monomeric. The N-lithiation leads to a distortion of the planar B 3 N 3 ring system: the B-N bonds at the metallated N atoms are short, the next opposite B-N pair is the longest, followed by a shorter B-N bond involving the B atom in the para position. However, all B-N bonds are longer than in the parent compound 1. Reaction of tBu 3 B 3 N 3 H 3 (3) with tBuLi in the presence
三甲基环硼氮烷 (Me 3 B 3 N 3 H 3 , 1) 在己烷溶液中通过烷基交换与 RLi (R = nBu, tBu) 反应,得到硼嗪 Me 3 - n R n B 3 N 3 H 2 的混合物。相比之下,1 到 Me 3 B 3 N 3 H 2 Li (2) 的去质子化发生在用二乙醚溶液中的 MeLi 或与四甲基乙二胺 (TMEDA)、五甲基二乙三胺 (PMDTA) 复合的 RLi (R = nBu, tBu) 或三甲基六氢三嗪 (TMTA) 的己烷溶液,得到 2. [(Me 3 B 3 N 3 H 2 )Li(OEt 2 )] (2a), [(Me 3 B 3 N 3 H 2 )Li(tmta) 的溶剂化物] (2c) 和 [(Me 3 B 3 N 3 H 2 Li) 4 (tmeda) 3 ] (2b) 包含 2 的二聚单元。在 2b 的情况下,这些二聚体中的两个由一个 tmeda
The Difluoromethyl Group as a Masked Nucleophile: A Lewis Acid/Base Approach
作者:Jacob B. Geri、Michael M. Wade Wolfe、Nathaniel K. Szymczak
DOI:10.1021/jacs.8b06093
日期:2018.8.1
that the combination of a Brønsted superbase with a weak Lewisacid enables deprotonation of Ar-CF2H groups and capture of reactive Ar-CF2- fragments. This route provides access to isolable and reactive Ar-CF2- synthons that react with a broad array of electrophiles at room temperature. The methodology is highly general in both electrophile and difluoromethyl (hetero)arene and can be applied directly
[EN] COMPLEXES FOR NUCLEOPHILIC, RADICAL, AND ELECTROPHILIC POLYFLUOROALKYLATION<br/>[FR] COMPLEXES POUR POLYFLUOROALKYLATION NUCLÉOPHILE, RADICALAIRE ET ÉLECTROPHILE
申请人:UNIV MICHIGAN REGENTS
公开号:WO2017223406A1
公开(公告)日:2017-12-28
Disclosed herein are borazine complexes and use of the same in perfluoroalkylation reactions.
本文披露了硼氮烷配合物及其在全氟烷基化反应中的应用。
Borazine‐CF
<sub>3</sub>
<sup>−</sup>
Adducts for Rapid, Room Temperature, and Broad Scope Trifluoromethylation
作者:Jacob B. Geri、Michael M. Wade Wolfe、Nathaniel K. Szymczak
DOI:10.1002/anie.201711316
日期:2018.1.26
A fluoroform‐derived borazine CF3− transfer reagent is used to effect rapid nucleophilic reactions in the absence of additives, within minutes at 25 °C. Inorganic electrophiles spanning seven groups of the periodic table can be trifluoromethylated in high yield, including transition metals used for catalytic trifluoromethylation. Organic electrophiles included (hetero)arenes, enabling C−H and C−X