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
Novel synthetic method for allylic amination of cyclic allylic ethers using chlorosulfonyl isocyanate
作者:Sang Hwi Lee、In Su Kim、Qing Ri Li、Guang Ri Dong、Young Hoon Jung
DOI:10.1016/j.tetlet.2011.02.036
日期:2011.4
The introduction of amines to allylic or benzylic position of cyclic compounds with chlorosulfonylisocyanate is developed in high to excellent yields. This method provides a novel access to biologically active compounds including the framework of 1-aminoindanes, 1-aminotetralines, and 1-amino-2-hydroxy cyclic compounds. Mechanistic evidence for the reaction pathway is also provided.
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.