Oxidative Cleavage of Alkenes by O<sub>2</sub> with a Non-Heme Manganese Catalyst
作者:Zhiliang Huang、Renpeng Guan、Muralidharan Shanmugam、Elliot L. Bennett、Craig M. Robertson、Adam Brookfield、Eric J. L. McInnes、Jianliang Xiao
DOI:10.1021/jacs.1c05757
日期:2021.7.7
however. There are only a small number of known synthetic metal catalysts that allow for the oxidativecleavage of alkenes at an atmospheric pressure of O2, with very few known to catalyze the cleavage of nonactivated alkenes. In this work, we describe a light-driven, Mn-catalyzed protocol for the selective oxidation of alkenes to carbonyls under 1 atm of O2. For the first time, aromatic as well as various
C=C双键与分子氧的氧化裂解产生羰基化合物是化学和药物合成中的一个重要转化。在自然界中,含有第一排过渡金属的酶,特别是血红素和非血红素铁依赖性酶,在环境条件下很容易激活 O 2并以极其精确的方式氧化裂解 C=C 键。然而,该反应对合成化学家来说仍然具有挑战性。只有少数已知的合成金属催化剂允许在 O 2大气压下氧化裂解烯烃,很少有人知道催化未活化烯烃的裂解。在这项工作中,我们描述了一种光驱动、Mn 催化的协议,用于在 1 个大气压的 O 2下将烯烃选择性氧化为羰基化合物。首次使用第一排生物相关金属催化剂,在清洁、温和的条件下,可以将芳香族和各种未活化的脂肪族烯烃氧化成酮和醛。此外,该协议显示出非常好的功能组耐受性。机理研究表明,Mn-oxo 物种,包括不对称的混合价双 (μ-oxo)-Mn(III,IV) 络合物,参与氧化,溶剂甲醇参与 O 2活化,导致oxo 物种的形成。
[EN] SUBSTITUTED HETEROARYL COMPOUNDS AND METHODS OF USE<br/>[FR] COMPOSÉS HÉTÉROARYLES SUBSTITUÉS ET MÉTHODES D'UTILISATION
申请人:CALITOR SCIENCES LLC
公开号:WO2015094803A1
公开(公告)日:2015-06-25
The present invention provides new heteroaryl compounds, pharmaceutical acceptable salts and formulations thereof useful in preventing, treating or lessening the severity of JAK-mediated diseases. The invention also provides pharmaceutically acceptable compositions comprising such compounds and methods of using the compositions in the treatment of JAK-mediated diseases.
Palladium-catalyzed carbonylative cross-coupling reaction of iodoalkanes with 9-alkyl-9-BBN derivatives. A direct and selective synthesis of ketones
作者:Tatsuo Ishiyama、Norio Miyaura、Akira Suzuki*
DOI:10.1016/0040-4039(91)80445-c
日期:1991.11
The synthesis of unsymmetricalketones by means of the palladium-catalyzed carbonylative cross-coupling reaction of 9-alkyl-9-BBN derivatives with iodoalkanes under a carbon monoxide atmosphere is described.
Cerium oxide as a catalyst for the ketonization of aldehydes: mechanistic insights and a convenient way to alkanes without the consumption of external hydrogen
作者:Lina M. Orozco、Michael Renz、Avelino Corma
DOI:10.1039/c6gc03511f
日期:——
The atom-efficient transformation of two aldehyde molecules into a linear alkane at the expense of one carbon dioxide molecule.
将两个醛分子转化为一分子线性烷烃,代价是一个二氧化碳分子。
Chiral Synthesis via Organoboranes. 47. Efficient Synthesis of Unsymmetrical Ketones and Enantiomerically Pure Spiroketals Using (±)-Isopinocampheyldichloroborane
作者:Herbert C. Brown、Shekhar V. Kulkarni、Uday S. Racherla、Ulhas P. Dhokte
DOI:10.1021/jo980989w
日期:1998.10.1
intermediate was readily converted into the unsymmetrical ketones, R(1)COR(2), in high yields and purity, by an established method. This methodology was successfully applied to the synthesis of enantiomerically pure spiroketals using optically pure TBS ether protected homoallylic alcohols as the alkenes for stepwise hydroboration.