Silica gel-promoted practical synthesis of oxindole-nitrones from diazooxindoles and nitrosoarenes under solvent-free conditions
A practical method for the synthesis of oxindole-nitrones promoted by silica gel was developed with good results. The protocol is environmentally friendly as the reaction proceeds under solvent-free conditions with broad substrate scope, and high selectiv
Zhang, Yun-Hao,Wu, Ming-Yue,Huang, Wen-Cai
p. 105825 - 105828
(2015/12/26)
Yb(NTf2)3-catalyzed [3 + 3] cycloaddition between isatin ketonitrones and cyclopropanes to construct novel spiro[tetrahydro-1,2- oxazine]oxindoles
Yb(NTf2)3-catalyzed [3 + 3] cycloaddition between isatin ketonitrones and cyclopropanes is described. A variety of spiro[tetrahydro-1,2-oxazine]oxindoles were obtained in moderate to good yields along with good regioselectivities. This is the first example of the intermolecular [3 + 3] cycloaddition between ketone-derived nitrones and cyclopropanes. The Royal Society of Chemistry 2012.
Yang, Hai-Bin,Shi, Min
supporting information
p. 8236 - 8243
(2012/11/07)
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