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。
Catalytic Method for the Reduction of Lactones to Lactols
作者:Xavier Verdaguer、Scott C. Berk、Stephen L. Buchwald
DOI:10.1021/ja00155a031
日期:1995.12
Convenient Two-Step Conversion of Lactones into Cyclic Ethers
作者:Marcus C. Hansen、Xavier Verdaguer、Stephen L. Buchwald
The syntheses of the title compounds were accomplished via an original sequence of reactions including the ring-closing metathesis of Ï-dienes by using the second-generation Grubbs’ catalyst. The chiral diene precursors are available in racemic or optically enriched form from the corresponding α,α′-disubstituted lactones derivatives