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。
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
Discovery of inhibitors and substrates of brassinin hydrolase: Probing selectivity with dithiocarbamate bioisosteres
作者:M. Soledade C. Pedras、Zoran Minic、Sajjad Hossain
DOI:10.1016/j.bmc.2011.11.009
日期:2012.1
inspired compounds, bioisosteres of brassinin and a range of related compounds, were evaluated as potential substrates and inhibitors of BHAb for the first time. While six compounds containing thiocarbamate, carbamate and carbonate groups displayed inhibitory activity against BHAb, only two were found to be substrates (thionecarbamate and dithiocarbamate). Methyl naphthalen-1-yl-methyl carbamate, the most
Palladium-Catalyzed Substitution and Cross-Coupling of Benzylic Fluorides
作者:George Blessley、Patrick Holden、Matthew Walker、John M. Brown、Véronique Gouverneur
DOI:10.1021/ol300977f
日期:2012.6.1
Benzylic fluorides are suitable substrates for Pd(0)-catalyzed Tsuji–Trost substitution using carbon, nitrogen, oxygen, and sulfur nucleophiles and for cross-coupling with phenylboronic acid. For the bifunctionalsubstrate 4-chlorobenzyl fluoride, fine-tuning of the reaction conditions allows for the regioselective displacement of either the chlorine or fluorine substituent. The leaving group ability
苯甲酸氟化物是使用碳,氮,氧和硫亲核试剂进行Pd(0)催化的Tsuji-Trost取代以及与苯基硼酸交叉偶联的合适底物。对于双官能底物4-氯苄基氟化物,反应条件的微调允许氯或氟取代基的区域选择性置换。的氟化物VS在替代移位其它基团的离去基团的能力是CF 3 CO 2 ≈ p -NO 2 ç 6 ħ 4 CO 2 ≈OCO 2 CH 3 >˚F> CH 3 CO 2,其排名与Pd催化下的烯丙基氟化物相似。