A Homochiral Microporous Hydrogen-Bonded Organic Framework for Highly Enantioselective Separation of Secondary Alcohols
摘要:
A homochiral microporous hydrogen. bonded organic framework (HOF-2) based on a BINOL derivative has been synthesized and structurally characterized to be a uninodal 6-connected {3(3)5(5)6(6)7} network. This new HOF exhibits not only a permanent porosity with the BET of 237.6 m(2) g(-1) but also, more importantly, a highly enantioselective separation of chiral secondary alcohols with ee value up to 92% for 1-phenylethanol.
An effective method for alkoxycarbonylation of (hetero)aryl bromides is developed in the presence of in situ-generated phosphinite ligands tBu2POR (R = nBu, nPr, Et or Me). For this purpose commercially available tBu2PCl was used as the pre-ligand in the presence of different alcohols. For the first time cross coupling reactions with two alcohols – one generating the ligand, the other used as substrate
在原位生成的次膦酸酯配体t Bu 2 POR(R = n Bu,n Pr,Et或Me)存在下,开发了一种用于(杂)芳基溴的烷氧羰基化的有效方法。为此目的,在不同醇存在下,将可商购的t Bu 2 PC1用作预配体。首次开发了与两种醇的交叉偶联反应-一种生成配体,另一种用作底物。通过这种方法,可以以更有效的方式进行配体优化,并且可以以良好的产率和选择性获得所需的产物。
Mechanistic insight into the synergistic Cu/Pd-catalyzed carbonylation of aryl iodides using alcohols and dioxygen as the carbonyl source
作者:Junxuan Li、Jinlei Zhou、Yumei Wang、Yue Yu、Qiang Liu、Tilong Yang、Huoji Chen、Hua Cao
DOI:10.1007/s11426-021-1122-6
日期:2022.1
Pd-catalyzed carbonylation, as an efficient synthetic approach for the installation of carbonyl groups in organic compounds, has been one of the most important research fields in the past decade. Although elegant reactions that allow highlyselective carbonylations have been developed, straightforward routes with improved reaction activity and broader substrate scope remain long-term challenges for
Various aryl iodides can be converted into α-keto esters in reactions with carbon monoxide and alcohols in the presence of tertiary amines and catalytic amounts of tertiary phosphine-coordinated palladium complexes.
Iron-Catalyzed One-Pot Oxidative Esterification of Aldehydes
作者:Xiao-Feng Wu、Christophe Darcel
DOI:10.1002/ejoc.200801176
日期:2009.3
A highly efficient, mild, and simple protocol for Fe(ClO4)3·xH2O-catalyzed oxidativeesterification of aldehydes was developed. Several aromatic and aliphatic aldehydes reacted with simple primary and secondary alcohols, used as the solvent, smoothly in the presence of an iron salt catalyst (10 mol-%) and hydroperoxide (4 equiv.) as an oxidant to generate the corresponding esters in good to excellent
Multicomponent Reaction: Palladium-Catalyzed Carbonylation of Aryl Halides and Alkyl Halides to Aromatic Esters
作者:Fengxiang Zhu、Pengpeng Yin、Pengbo Zhang
DOI:10.1021/acs.joc.2c01794
日期:——
A convenient four-component reaction has been developed that allows for the direct transformation of aryl iodides with alkylhalides into the corresponding aromatic esters and diesters via palladium-catalyzed carbonylation with water as solvent. Various esters and diesters were isolated in moderate to good yields with broad functional group tolerance.