我们通过概念上不同的扩环策略开发了一种有效的中环和大环内酯合成方法。The design of an unprecedented ring conjunction mode of oxetene, combined with the appropriate choice of a Lewis acid promoter and an additive, constitutes the key components of the new process. 通过这种新方法,反应不需要高度稀释或缓慢添加。
DOI:
10.1021/ja400883q
作为产物:
描述:
alkaline earth salt of/the/ methylsulfuric acid 在
palladium on activated charcoal 、 乙醇 作用下,
生成 acetic acid oxepan-2-yl ester
参考文献:
名称:
The Oxidation of Hydrocarbons. I. The Oxidation of Cyclohexene in Acetic and Propionic Anhydride Solutions1
Oxidation of α,ω-Diols Using the Dess-Martin Periodinane
作者:Jochen Roels、Peter Metz
DOI:10.1055/s-2001-14610
日期:——
Depending on the length of the carbon tether, α,Ï-diols either afford cyclic acetoxy acetals or dialdehydes upon treatment with the Dess-Martin periodinane.
A New Strategy for Efficient Synthesis of Medium and Large Ring Lactones without High Dilution or Slow Addition
作者:Wanxiang Zhao、Zigang Li、Jianwei Sun
DOI:10.1021/ja400883q
日期:2013.3.27
We have developed an efficient method for medium and large ring lactonesynthesis by a conceptually different ring-expansion strategy. The design of an unprecedented ring conjunction mode of oxetene, combined with the appropriate choice of a Lewis acid promoter and an additive, constitutes the key components of the new process. Enabled by this new approach, the reaction does not require high dilution
我们通过概念上不同的扩环策略开发了一种有效的中环和大环内酯合成方法。The design of an unprecedented ring conjunction mode of oxetene, combined with the appropriate choice of a Lewis acid promoter and an additive, constitutes the key components of the new process. 通过这种新方法,反应不需要高度稀释或缓慢添加。
Asymmetric Catalysis via Cyclic, Aliphatic Oxocarbenium Ions
作者:Sunggi Lee、Philip S. J. Kaib、Benjamin List
DOI:10.1021/jacs.6b11993
日期:2017.2.15
A direct enantioselectivesynthesis of substituted oxygen heterocycles from lactol acetates and enolsilanes has been realized using a highly reactive and confined imidodiphosphorimidate (IDPi) catalyst. Various chiral oxygen heterocycles, including tetrahydrofurans, tetrahydropyrans, oxepanes, chromans, and dihydrobenzofurans, were obtained in excellent enantioselectivities by reacting the corresponding
Synthesis of medium-sized lactones from siloxy alkynes via ring expansion
作者:An Wu、Wanxiang Zhao、Jianwei Sun
DOI:10.1016/j.tet.2020.131163
日期:2020.12
topic in organic synthesis due to the disfavored kinetic and thermodynamic features. Herein we detail an efficient intermolecular process using siloxyalkynes as substrates and oxetene ring expansion as the key strategy. With extension to a new silyl-masked alkyne, this reaction now features a broad scope, high efficiency, and mild conditions.