example of a homogeneous catalyst based on an earth‐abundant metal for the hydrogenation of organic carbonates to methanol and alcohols is reported. Based on the mechanistic investigation, which indicates metal‐ligand cooperation between the manganese center and the N−H group of the pincer ligand, we propose that the hydrogenation of organic carbonates to methanol occurs via formate and aldehyde intermediates
Visible‐Light‐Enabled Carboxylation of Benzyl Alcohol Derivatives with CO
<sub>2</sub>
Using a Palladium/Iridium Dual Catalyst
作者:Yushu Jin、Naoyuki Toriumi、Nobuharu Iwasawa
DOI:10.1002/cssc.202102095
日期:2022.2.8
Double trouble: A highly efficient visible-light-enabled carboxylation of benzyl alcohol derivatives using CO2 is achieved with a Pd/Ir dual catalyst. A variety of benzyl carboxylic acids and esters can be prepared from the corresponding benzyl alcohol derivatives with high efficiency. By changing the Pd catalyst, switchable site-selective carboxylation between benzylic C−O and aryl C−Cl moieties is
双重麻烦:使用Pd/Ir 双催化剂实现了使用 CO 2对苯甲醇衍生物进行高效可见光羧化。由相应的苄醇衍生物可以高效地制备多种苄基羧酸和酯。通过改变 Pd 催化剂,可以在苄基 C-O 和芳基 C-Cl 部分之间进行可切换的位点选择性羧化。
Benzyl Protection of Phenols under Neutral Conditions: Palladium-Catalyzed Benzylations of Phenols
作者:Ryoichi Kuwano、Hiroki Kusano
DOI:10.1021/ol800548t
日期:2008.5.1
Benzyl protection of phenols under neutral conditions was achieved by using a Pd(eta3-C3H5)Cp-DPEphos catalyst. The palladium catalyst efficiently converted aryl benzyl carbonates into benzyl-protected phenols through the decarboxylative etherification. Alternatively, the nucleophilic substitution of benzyl methyl carbonates with phenols proceeded in the presence of the catalyst, yielding aryl benzyl
Palladium-catalyzed Cross-coupling of Benzylic Carbonates with Organostannanes
作者:Masato Ohsumi、Ryoichi Kuwano
DOI:10.1246/cl.2008.796
日期:2008.7.5
The cross-coupling of benzylic carbonates with arylstannanes proceeded in the presence of [Pd(η3-C3H5)Cl]2–DPPPent catalyst, affording the desired diarylmethanes in good yield.
Suzuki−Miyaura Cross-Coupling of Benzylic Carbonates with Arylboronic Acids
作者:Ryoichi Kuwano、Masashi Yokogi
DOI:10.1021/ol050078q
日期:2005.3.1
The cross-coupling of benzylic carbonates with arylboronicacids gave the corresponding diarylmethanes in high yields by use of the palladium catalyst generated in situ from [Pd(eta(3)-C(3)H(5))Cl](2) and 1,5-bis(diphenylphosphino)pentane (DPPPent). The Suzuki-Miyaura reaction using DPPPent-palladium catalyst is applicable to syntheses of a broad range of functionalized diarylmethanes. [reaction: see