Facile preparation of α-amino ketones from oxidative ring-opening of aziridines by pyridine N-oxide
作者:Zhi-Bin Luo、Jing-Yu Wu、Xue-Long Hou、Li-Xin Dai
DOI:10.1039/b711638a
日期:——
The oxidative ring-opening reaction of a variety of activated aziridines by pyridineN-oxide provided alpha-amino ketones or alpha-amino aldehydes in good yields.
各种活化的氮丙啶通过吡啶N-氧化物的氧化开环反应以良好的产率提供了α-氨基酮或α-氨基醛。
Synthesis of α-Amino Ketones from Terminal Alkynes via Rhodium-Catalyzed Denitrogenative Hydration of <i>N</i>-Sulfonyl-1,2,3-triazoles
N-Sulfonyl-1,2,3-triazoles react with water in the presence of a rhodium catalyst to produce alpha-amino ketones in high yield. An intermediary alpha-imino rhodium(II) carbenoid undergoes insertion into the O-H bond of water. This transformation formally achieves 1,2-aminohydroxylation of terminal alkynes in a regioselective fashion when combined with the copper(I)-catalyzed 1,3-dipolar cycloaddition with N-sulfonyl azides.
Synthesis of Multifunctionalized 2-Carbonylpyrrole by Rhodium-Catalyzed Transannulation of 1-Sulfonyl-1,2,3-triazole with β-Diketone
作者:Wanli Cheng、Yanhua Tang、Ze-Feng Xu、Chuan-Ying Li
DOI:10.1021/acs.orglett.6b03179
日期:2016.12.2
A facile rhodium-catalyzed transannulation of 1-sulfonyl-1,2,3-triazoles with β-diketones was realized, and a series of multisubstituted 2-carbonylpyrroles were synthesized efficiently (up to 94% yield). The protocol features several advantages, such as readily available materials, mild reaction conditions, a concise operating procedure, a broad reaction scope, and excellent regioselectivity when benzoylacetone