这里报道的是针对Achmatowicz重排(AchR)的环保型催化(KBr / oxone)和无溶剂方案的开发。与所有以前的方法不同的是,使用色谱氧化铝(Al 2 O 3)可使AchR在不存在任何有机溶剂的情况下顺利进行,因此可极大地促进后续的后处理和纯化,并且对环境的影响最小。重要的是,该协议允许按比例放大(从毫克到克),回收Al 2 O 3以及与其他反应按一锅顺序方式进行整合。
A solvent-free catalytic protocol for the Achmatowicz rearrangement
作者:Guodong Zhao、Rongbiao Tong
DOI:10.1039/c8gc03030h
日期:——
Reported here is the development of an environmentally friendly catalytic (KBr/oxone) and solvent-free protocol for the Achmatowiczrearrangement (AchR). Different from all previous methods is that the use of chromatographic alumina (Al2O3) allows AchR to proceed smoothly in the absence of any organic solvent and therefore considerably facilitates the subsequent workup and purification with minimal
这里报道的是针对Achmatowicz重排(AchR)的环保型催化(KBr / oxone)和无溶剂方案的开发。与所有以前的方法不同的是,使用色谱氧化铝(Al 2 O 3)可使AchR在不存在任何有机溶剂的情况下顺利进行,因此可极大地促进后续的后处理和纯化,并且对环境的影响最小。重要的是,该协议允许按比例放大(从毫克到克),回收Al 2 O 3以及与其他反应按一锅顺序方式进行整合。
Stereocontrolled synthesis of highly functionalised spirocyclic pyrans
作者:Stephen J. Hobson、Rodolfo Marquez
DOI:10.1039/b611737f
日期:——
Highly functionalised spirocyclic pyrans can be obtained through the Achmatowicz rearrangement of furyl carbinols by taking advantage of the different rates of reaction for epoxidation and nucleophilic addition. Through this methodology, spirocyclic units of various ring sizes can be selectively generated with complete stereocontrol.