Catalytic dehydrogenative dual functionalization of ethers: dealkylation–oxidation–bromination accompanied by C–O bond cleavage via aerobic oxidation of bromide
A catalytic dehydrogenative dual functionalization (DDF) of ethers viaoxidation, dealkylation, and α-bromination by the aerobic oxidation of bromide was developed to obtain the corresponding α-bromo ketones in high yields. In particular, the reaction of substituted tetrahydrofurans as cyclic ethers provided 3,3-dibromo tetrahydrofuran-2-ols in high yields selectively through the double α-bromination
Silylium‐Catalyzed Alkynylation and Etherification Reactions of Benzylic Acetates
作者:Belén Rubial、Alfredo Ballesteros、José M. González
DOI:10.1002/ejoc.202200051
日期:2022.7.14
Bistriflimide-catalyzed coupling reactions of benzylacetates with both trimethyl(alkynyl)silanes and trimethyl(alkoxy)silanes lead to propargyl arenes and benzyl alkyl ethers, respectively. The acid assists the release of the reactive trimethylsilylium ion into the media, which is the ultimate catalytic species. The cationic nature of the processes is documented.
Oxidative Debenzylation of <i>N</i>-Benzyl Amides and <i>O</i>-Benzyl Ethers Using Alkali Metal Bromide
作者:Katsuhiko Moriyama、Yu Nakamura、Hideo Togo
DOI:10.1021/ol501703y
日期:2014.7.18
The oxidative debenzylation of N-benzyl amides and O-benzyl ethers was promoted with high efficiency by a bromo radical formed through the oxidation of bromide from alkali metal bromide under mild conditions. This reaction provided the corresponding amides from N-benzyl amides and carbonyl compounds from O-benzyl ethers in high yields.
Nuclear Magnetic Resonance Spectroscopy. The Effect of Solvent on Magnetic Nonequivalence Arising from Molecular Asymmetry<sup>1a</sup>
作者:George M. Whitesides、John J. Grocki、David Holtz、Herbert Steinberg、John D. Roberts