Phenyliodine diacetate-mediated oxidative cleavage of cyclobutanols leading to γ-hydroxy ketones
摘要:
Oxidative cleavage of cyclobutanols using PIDA, which leads to efficient entry of gamma-hydroxy ketones, is described. When using 2-substituted cyclobutanols, gamma-substituted gamma-hydroxy ketones are obtained through regioselective C-C bond cleavage. (C) 2010 Elsevier Ltd. All rights reserved.
Manganese-Catalyzed Electrochemical Deconstructive Chlorination of Cycloalkanols via Alkoxy Radicals
作者:Benjamin D. W. Allen、Mishra Deepak Hareram、Alex C. Seastram、Tom McBride、Thomas Wirth、Duncan L. Browne、Louis C. Morrill
DOI:10.1021/acs.orglett.9b03652
日期:2019.11.15
A manganese-catalyzedelectrochemicaldeconstructivechlorination of cycloalkanols has been developed. This electrochemical method provides access to alkoxyradicals from alcohols and exhibits a broad substrate scope, with various cyclopropanols and cyclobutanols converted into synthetically useful β- and γ-chlorinated ketones (40 examples). Furthermore, the combination of recirculating flow electrochemistry
C−C Bond-Forming Strategy by Manganese-Catalyzed Oxidative Ring-Opening Cyanation and Ethynylation of Cyclobutanol Derivatives
作者:Rongguo Ren、Zhen Wu、Yan Xu、Chen Zhu
DOI:10.1002/anie.201510973
日期:2016.2.18
cyano C1 unit and ethynyl C2 unit are regiospecifically introduced to the γ‐position of ketones at room temperature, providing a mild yet powerful method for production of elusive aliphatic nitriles and alkynes. All transformations described are based on a common sequence: 1) oxidative ring‐opening of cyclobutanol substrates by C−C bond cleavage; 2) radical addition to triple bonds bearing an arylsulfonyl
Silver-Catalyzed Ring-Opening Strategy for the Synthesis of β- and γ-Fluorinated Ketones
作者:Huijun Zhao、Xuefeng Fan、Jiajia Yu、Chen Zhu
DOI:10.1021/jacs.5b00939
日期:2015.3.18
A regioselective synthesis of β- and γ-fluorinated ketones via silver-catalyzed ring opening is described. A variety of β- and γ-fluorinated ketones are efficiently prepared, respectively, from tertiary cyclopropanol and cyclobutanol precursors, providing a straightforward approach for the introduction of a fluorine atom into complex molecules. Preliminary mechanistic studies suggest that a radical-mediated
描述了通过银催化开环的 β- 和 γ-氟化酮的区域选择性合成。各种β-和γ-氟化酮分别由叔环丙醇和环丁醇前体有效制备,为将氟原子引入复杂分子提供了一种直接的方法。初步机理研究表明,涉及自由基介导的连续 CC 键裂解和 CF 键形成途径。
C-C Bond Formation by Oxidative Ring-Opening Homocoupling of Cyclobutanols
作者:Huiying Zeng、Pan Pan、Jinping Chen、Hang Gong、Chao-Jun Li
DOI:10.1002/ejoc.201601505
日期:2017.2.10
The formation of a C(sp(3))-C(sp(3)) bond by oxidative ring-opening homocoupling of cyclobutanols was explored. A broad scope of 1-substituted cyclobutanols were transformed into C(sp(3))-C(sp(3)) bond-formation products by oxidative ring opening in good to high yields under exceptionally mild conditions in an open flask in just 30 s.