Organic Letters
Letter
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(h) Zhang, S.; Guo, L.-N.; Wang, H.; Duan, X.-H. Org. Biomol. Chem.
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(5) For transition-metal-free decarboxylative coupling of α-
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Z.; Qi, X.; Li, S.; Zhao, Y.; Gao, G.; Lan, Y.; Wu, Y.; Lan, J.; You, J.
Angew. Chem., Int. Ed. 2015, 54, 855. (b) Yuan, M.; Chen, L.; Wang, J.;
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(6) (a) Zhdankin, V. V.; Kuehl, C. J.; Krasutsky, A. P.; Bolz, J. T.;
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(g) Kamlar, M.; Císaro
2884.
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(g) Nguyen, K. H.; Tomasi, S.; Roch, M. L.; Toupet, L.; Renault, J.;
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(12) For pioneering work on the decarboxylation of carboxylic acids
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(13) In order to improve the conversion of this reaction, some
conditions have been studied. Unfortunately, no satisfying results have
been achieved at present. For details, see the Supporting Information.
(14) For recent reviews using DMF as a reactant, see: (a) Muzart, J.
Tetrahedron 2009, 65, 8313. (b) Ding, S.; Jiao, N. Angew. Chem., Int.
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