cleavage of unfunctionalized secondary (2°) and tertiary alcohols (3°) is essential for valorization of macromolecules and biopolymers. We developed a blue-light-driven iron catalysis for aerobic oxidation of 2° and 3° alcohols to acids via α-C–C bond cleavages at room temperature. The first example of oxygenation of the simple tertiary alcohols was reported. The iron catalyst and blue light play critical
Rhodium(I)/Diene-Catalyzed Addition Reactions of Arylborons with Ketones
作者:Yuan-Xi Liao、Chun-Hui Xing、Qiao-Sheng Hu
DOI:10.1021/ol300275s
日期:2012.3.16
Rh(I)/diene-catalyzed additionreactions of arylboroxines/arylboronic acids with unactivated ketones to form tertiary alcohols in good to excellent yields are described. By using C2-symmetric (3aR,6aR)-3,6-diaryl-1,3a,4,6a-tetrahydropentalenes as ligands, the asymmetric version of such an additionreaction, with up to 68% ee, was also realized.
描述了 Rh(I)/二烯催化的芳基环硼氧烷/芳基硼酸与未活化酮形成叔醇的加成反应,收率很好。通过使用C 2 -对称 (3a R ,6a R )-3,6-二芳基-1,3a,4,6a-四氢戊烯作为配体,这种加成反应的不对称形式,具有高达 68% ee,也实现了。
Synthesis and anticonvulsant activity of 1-phenylcyclohexylamine analogs
作者:Andrew Thurkauf、Brian De Costa、Shunichi Yamaguchi、Mariena V. Mattson、Arthur E. Jacobson、Kenner C. Rice、Michael A. Rogawski
DOI:10.1021/jm00167a027
日期:1990.5
moderate correlation with the affinities for PCP sites. Several analogues exhibited a greater separation of potencies in the motor toxicity and MES seizure tests than did the parent compound PCA. These were obtained by (i) 3-methylation of the cyclohexyl ring trans to the phenyl ring, (ii) methoxylation at the ortho position on the phenyl ring, and (iii) contraction of the cyclohexane ring to form the corresponding
Photoinduced Ligand-to-Metal Charge Transfer (LMCT) of Fe Alkoxide Enabled C–C Bond Cleavage and Amination of Unstrained Cyclic Alcohols
作者:Ting Xue、Zongnan Zhang、Rong Zeng
DOI:10.1021/acs.orglett.1c04365
日期:2022.1.28
an alkoxy radical process for the C–C bond cleavage and functionalization of unstrained tertiary and secondary cyclic alcohols. In the absence of a chlorine atom, the readily available iron catalysts [Fe(OBu-t)3 or Fe(acac)3/t-BuONa] facilitate alkoxy radical formation via the direct ligand-to-metal charge transfer of Fe alkoxide and further enable the ring opening and amination of cyclic alcohols.
我们报告了一种用于 C-C 键断裂和无应变叔和仲环醇官能化的烷氧基自由基过程。在没有氯原子的情况下,容易获得的铁催化剂 [Fe(OBu- t ) 3或 Fe(acac) 3 / t -BuONa] 通过烷氧基铁的直接配体到金属的电荷转移促进烷氧基自由基的形成,进一步使环状醇的开环和胺化成为可能。在温和的氧化还原中性体系下,可以以高产率获得范围广泛的远程氨基羰基化合物。光驱动的电子转移、烷氧基自由基的形成以及随后通过 β 断裂的 C-C 键断裂是转化的关键。
Ring-opening iodination and bromination of unstrained cycloalkanols through β-scission of alkoxy radicals
作者:Jiang-Ling Shi、Yuankai Wang、Zixuan Wang、Bowen Dou、Jianbo Wang
DOI:10.1039/d0cc01720e
日期:——
Ring-opening iodination or bromination of unstrained cycloalkanols with NaI or NaBr and PhI(OAc)2 under visible light irradiation is developed. In this protocol the concentration of I2 is modulated through the generation of triiodide (I3-), thus significantly avoiding undesired side reactions. The reaction is under mild conditions and has a wide substrate scope, thus providing a practically useful