Synthesis of Unsymmetrical Pyrazines Based on α-Diazo Oxime Ethers
作者:Nicole S. Y. Loy、Sunggak Kim、Cheol-Min Park
DOI:10.1021/ol5034173
日期:2015.2.6
Synthesis of unsymmetrically substituted pyrazines has been a challenge. The reactivity of α-imino carbenoids derived from α-diazo oxime ethers has been exploited for pyrazinesynthesis, in which the reaction of α-diazo oxime ethers with 2H-azirines provides highly substituted pyrazines in good to excellent yields.
Facile synthesis of 2-alkyl/aryloxy-2H-azirines and their application in the synthesis of pyrroles
作者:Xinxin Qi、Xianxiu Xu、Cheol-Min Park
DOI:10.1039/c2cc30490b
日期:——
Free carbenes generated from alpha-diazo oxime ethers by photolysis undergo facile N-O insertion to afford 2-alkyl/aryloxy-2H-azirines in good to excellent yields. This method allowed for the development of a tandem reaction for pyrrolesynthesis via 1,3-dipolar cycloaddition.
The synthesis of pyrroles and oxazoles based on gold α-imino carbene complexes
作者:Nicole S. Y. Loy、Subin Choi、Sunggak Kim、Cheol-Min Park
DOI:10.1039/c6cc01742h
日期:——
Cationic gold complexes of [small alpha]-oximimino carbenes have been identified to react with nucleophiles with attenuated reactivity including enol ethers and nitriles. These findings allowed us to develop highly efficient synthesis...