Mechanisms for interconversions among C3H4 hydrocarbons: deuterium isotope effects and independent generation of vinylmethylene intermediates in photoisomerizations of allenes and cyclopropenes
Metal- and Acid-Free Methyl Triflate Catalyzed Meyer–Schuster Rearrangement
作者:Qingle Zeng、Lu Yang
DOI:10.1055/s-0036-1588800
日期:2017.7
acid-free preparation of synthetically useful α,β-unsaturated carbonyl compounds from propargyl alcohols has been realized. This Meyer–Schuster rearrangement process is effectively catalyzed by methyl triflate (20 mol%) to prepare a broad scope of conjugated E-enals and E-enones generally in good to excellent yields (up to 90%). This reaction procedure operates under mild conditions (70 °C), in air
Enantioselective Reduction of Ketones and Imines Catalyzed by (CN-Box)ReV-Oxo Complexes
作者:Kristine A. Nolin、Richard W. Ahn、Yusuke Kobayashi、Joshua J. Kennedy-Smith、F. Dean Toste
DOI:10.1002/chem.201001164
日期:2010.8.16
application of chiral, non‐racemic ReV–oxo complexes to the enantioselectivereduction of prochiral ketones is described. In addition to the enantioselectivereduction of prochiral ketones, we report the application of these complexes to 1) a tandem Meyer–Schuster rearrangement/reduction to access enantioenriched allylic alcohols and 2) the enantioselectivereduction of imines.
描述了手性非外消旋 Re V - oxo 配合物在前手性酮的对映选择性还原中的开发和应用。除了前手性酮的对映选择性还原外,我们还报告了这些复合物在以下方面的应用:1)串联 Meyer-Schuster 重排/还原以获取对映体富集的烯丙醇和 2)亚胺的对映选择性还原。
Regioselective synthesis of N-containing polycyclic compounds <i>via</i> radical annulation cyclization of 1,7-dienes with aldehydes
作者:Jia-Li Sui、Long-Jin Zhong、Bi-Quan Xiong、Ke-Wen Tang、Yu Liu
DOI:10.1039/d4cc00964a
日期:2024.4.30
A convenient method for oxidant-promoted radical cascade acylation or decarbonylative alkylation of 1,7-dienes with aldehydes has been established. This method allows for the rapid construction of N-containing polycyclic skeletons in a highly regio- and stereoselective manner. This transformation provides a simple and efficient method for the preparation of a range of tetrahydro-6H-indeno[2,1-c]quinolinone