在此,一种新的同熔混合阴离子化合物 Cs 4 B 4 O 3 F 10已被表征为第一个具有 [BF 4 ] 的含杂阴离子单元的氟代硼酸盐。化合物Cs 4 B 4 O 3 F 10具有两个高度氟化的阴离子簇,因此其分子式可以表示为Cs 3 (B 3 O 3 F 6 ) ⋅ Cs(BF 4 )。基于母体化合物讨论了[BF 4 ]单元对微对称性和结构演化的影响。更重要的是,Cs 4B 4 O 3 F 10在所有可用的硼酸盐中显示出最低的熔点,从而为此类系统创造了新的记录。这项工作对于使用全氟化 [BF 4 ] 单元丰富和定制硼酸盐的结构具有重要意义。
Vinylation of Benzylic Amines via C–N Bond Functionalization of Benzylic Pyridinium Salts
作者:Mary Watson、Weiye Guan、Jennie Liao
DOI:10.1055/s-0037-1610084
日期:2018.8
Published as part of the Special Topic Modern Coupling Approaches and their Strategic Applications in Synthesis Abstract Cross-couplings of benzylic pyridinium salts and vinylboronic acids or esters have been developed. Via benzylic pyridinium intermediates, benzylic amines can be engaged in these cross-couplingsthrough C–N bond functionalization. This method boasts mild reaction conditions and excellent
Herein we reported the electrochemical hydroboration of alkynes by using B2Pin2 as the boron source. This unprecedented reaction manifold was applied to a broad range of alkynes, giving the hydroboration products in good to excellent yields without the need of a metal catalyst or a hydride source. This transformation relied on the possible electrochemical oxidation of an in situ formed borate. This
在此,我们报道了使用 B 2 Pin 2作为硼源的炔烃的电化学硼氢化反应。这种前所未有的反应歧管适用于广泛的炔烃,无需金属催化剂或氢化物源,即可使硼氢化产物具有良好的收率。这种转变依赖于原位形成的硼酸盐可能的电化学氧化。这种在未分开的电池中进行的阳极氧化允许形成推定的硼基自由基,该自由基与炔烃发生反应。
Chemoselective Boronic Ester Synthesis by Controlled Speciation
作者:James W. B. Fyfe、Ciaran P. Seath、Allan J. B. Watson
DOI:10.1002/anie.201406714
日期:2014.11.3
Control of boronic acid solution speciation is presented as a new strategy for the chemoselective synthesis of boronic esters. Manipulation of the solution equilibria within a cross‐coupling milieu enables the formal homologation of aryl and alkenyl boronic acid pinacol esters. The generation of a new, reactive boronic ester in the presence of an active palladium catalyst also facilitates streamlined
硼酸溶液形态的控制是硼酸酯化学选择性合成的一种新策略。在交叉偶联环境中控制溶液平衡可以实现芳基和烯基硼酸频哪醇酯的形式同系化。在活性钯催化剂存在下生成新的反应性硼酸酯也有助于简化迭代催化 C C 键的形成,并为 sp 2杂化硼酸酯的受控低聚提供了一种方法。
BRIDGEHEAD AMINE RING-FUSED INDOLES AND INDOLINES
申请人:Shi Lei
公开号:US20110152248A1
公开(公告)日:2011-06-23
The present application relates to indole and indoline derivatives of formula (I), formula (II), formula (III), or formula (IV)
wherein a, R
2
, R
3
, h, k, m, n, L, Q, X, and Z are as defined in the specification. The present application also relates to compositions comprising such compounds, and methods of treating disease conditions using such compounds and compositions.
Compounds of formula (I), wherein R
1
is as defined in the claims, exhibit COMT enzyme inhibiting activity and are thus useful as COMT inhibitors. Methods of treatment and pharmaceutical dosage forms are also disclosed.