Efficient access to 2,5-substituted tetrahydrofurans via a one-pot cyclization of di- and triepoxides
摘要:
The one-pot addition and cyclization of 1,5-diepoxyhexane with a range of organolithium species provides efficient access to 2,5-substituted tetrahydrofurans (THFs), common structural motifs found in a range of natural products and pharmaceutical ingredients, Extension of this reaction to triepoxides has also been demonstrated to access adjacently linked bis-THF motifs in a single step. (C) 2008 Elsevier Ltd. All rights reserved.
Efficient access to 2,5-substituted tetrahydrofurans via a one-pot cyclization of di- and triepoxides
作者:Gordon J. Florence、Romain Cadou
DOI:10.1016/j.tetlet.2008.09.053
日期:2008.11
The one-pot addition and cyclization of 1,5-diepoxyhexane with a range of organolithium species provides efficient access to 2,5-substituted tetrahydrofurans (THFs), common structural motifs found in a range of natural products and pharmaceutical ingredients, Extension of this reaction to triepoxides has also been demonstrated to access adjacently linked bis-THF motifs in a single step. (C) 2008 Elsevier Ltd. All rights reserved.
Copper-Catalyzed Enantioselective Aerobic Alkene Aminooxygenation and Dioxygenation: Access to 2-Formyl Saturated Heterocycles and Unnatural Proline Derivatives
作者:Raul L. L. Carmo、Samuel L. Galster、Tomasz Wdowik、Chaeeon Song、Sherry R. Chemler
DOI:10.1021/jacs.3c01985
日期:2023.6.28
Alkeneaminooxygenation and dioxygenation reactions that result in carbonyl products are uncommon, and protocols that control absolute stereochemistry are rare. We report herein catalytic enantioselective alkeneaminooxygenation and dioxygenation that directly provide enantioenriched 2-formyl saturated heterocycles under aerobic conditions. Cyclization of substituted 4-pentenylsulfonamides, catalyzed