A Convenient and Versatile Method for the Preparation of α-Hydroxymethyl Ketone Derivatives from the Corresponding Allyl Silyl Ethers or Allyl Carboxylates
作者:Yung-Son Hon、Ying-Chieh Wong、Kuo-Jui Wu
DOI:10.1002/jccs.200800134
日期:2008.8
The ozonolysis of 1-substituted allyl silyl ethers or 1-substituted allyl carboxylates followed by treatment with bases gave the corresponding α-silyloxymethyl- or a-acyloxymethyl-ketones in good yields. It is proposed to proceed via the corresponding α-silyloxy- or α-acyloxyaldehydes intermediates followed by 1,4-group migration. The results of theoretical calculations are applicable to explain the
Optimizing P,N-Bidentate Ligands for Oxidative Gold Catalysis: Efficient Intermolecular Trapping of α-Oxo Gold Carbenes by Carboxylic Acids
作者:Kegong Ji、Yulong Zhao、Liming Zhang
DOI:10.1002/anie.201301601
日期:2013.6.17
Control confirmed: Optimization of P,N‐bidentateligands (L) reveals the importance of conformation control for intermolecular trapping of reactive α‐oxo gold carbene intermediates. As a result, the highly efficient and broadly applicable synthesis of carboxymethyl ketones from readily available carboxylic acids and terminal alkynes proceeds under mild reaction conditions.
控制确认:P,N-双齿配体 ( L ) 的优化揭示了构象控制对于反应性 α-氧代金卡宾中间体的分子间捕获的重要性。因此,在温和的反应条件下,可以从易得的羧酸和末端炔烃高效且广泛地合成羧甲基酮。
Synthetic applications of the amine-base treatment in the ozonolysis of substituted-allyl silyl ethers or -allyl esters via a novel ene–diol type rearrangement
作者:Yung-Son Hon、Ying-Chieh Wong
DOI:10.1016/j.tetlet.2004.12.135
日期:2005.2
The ozonolysis of substituted-allyl silyl ethers or -allyl esters followed by treatment with bases gave the corresponding α-silyloxy ketones or α-acyloxy ketones in good yields. The reaction is proposed to proceed via a novel ene–diol rearrangement of the corresponding α-silyloxy aldehydes or α-acyloxy aldehydes intermediates.