Stabilized and Destabilized Carbocations in the 1,6-Methano[10]annulene Series
作者:Xavier Creary、Kevin Miller
DOI:10.1021/jo035006w
日期:2003.10.1
2-Chloromethyl and 3-chloromethyl-1,6-methano[10]annulenesystems solvolyze in methanol to give simple substitution products. Solvent effect studies and the special salt effect support the involvement of cationic intermediates stabilized by the 1,6-methano[10]annulene group. Rate data indicate that the degree of cation stabilization greatly exceeds that of naphthyl groups. B3LYP/6-31G computational
作者:Danny C. Lenstra、Peter E. Lenting、Jasmin Mecinović
DOI:10.1039/c8gc02136h
日期:——
A highly efficient and sustainable catalytic Staudingerreduction for the conversion of organic azides to amines in excellent yields has been developed. The reaction displays excellent functional group tolerance to functionalities that are otherwise prone to reduction, such as sulfones, esters, amides, ketones, nitriles, alkenes, and benzyl ethers. The green nature of the reaction is exemplified by
A metal-free catalytic system for the oxidation of benzylic methylenes and primary amines under solvent-free conditions
作者:Jintang Zhang、Zhentao Wang、Ye Wang、Changfeng Wan、Xiaoqi Zheng、Zhiyong Wang
DOI:10.1039/b919346b
日期:——
system for the oxidation of benzylic methylenes to ketones and primaryamines to nitriles. The reaction conditions are quite mild and environmentally benign, no transition metals, organic solvents or hazard reagents being needed. The oxidation of benzylic methylenes gave the corresponding ketones in excellent yields with complete chemoselectivity, while the oxidation of primaryamines was complete in
Deoxygenation of Ethers To Form Carbon–Carbon Bonds via Nickel Catalysis
作者:Zhi-Chao Cao、Zhang-Jie Shi
DOI:10.1021/jacs.7b02326
日期:2017.5.17
In this article a successful protocol was developed to construct carbon-carbonbonds by the extrusion of the O atom of ethers via nickel catalysis in the presence of reductants. This methodology is featured as a highly economic route to construct sp3-sp3 C-C bonds through dual C-O activation of ethers with good functional group tolerance.
在这篇文章中,开发了一个成功的协议,通过在还原剂的存在下通过镍催化挤出醚的 O 原子来构建碳 - 碳键。该方法是通过具有良好官能团耐受性的醚的双 CO 活化来构建 sp3-sp3 CC 键的高度经济途径。
Photoinduced electron transfer reaction of cyclopropanone acetals with arylmethyl methanesulfonate: generation of β-keto radical species and application to C–C bond formation
作者:Manabu Abe、Akira Oku
DOI:10.1039/c39940001673
日期:——
The photoinduced electron transfer reaction of the cyclopropanone acetals 1 with arylmethyl methanesulfonates 4 or 10 as electron acceptors was found to generate a transient pair of radicals, the β-keto radical 3 and the arylmethyl radical, which underwent a novel carbonâcarbon bond formation reaction at the sterically hindered β-position of the esters.