Green Chemistry
Communication
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catalyzed reactions (Scheme 2, entries 1 and 2) (see ESI†),
suggesting that Ph2CHBr or Ph2CHCl directly reacted with
1a to give 3a and was then regenerated specifically without
formation of PhCH2Br or PhCH2Cl.
(e) R. M. Trend, Y. K. Ramtohul and B. M. Stoltz, J. Am. 16 R. Felstead, S. E. Gibson, A. Rooney and E. S. Y. Tse,
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and J.-Q. Yu, J. Am. Chem. Soc., 2004, 126, 7359; (g) T. Shintou 17 Loss of X due to distillation of low b.p. HX can result in
and T. Mukaiyama, J. Am. Chem. Soc., 2004, 126, 7359.
9 (a) Q. Xu and Q. Li, Chin. J. Org. Chem., 2013, 33, 18;
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ineffective regeneration of RX and ineffective catalysis of
the etherification reaction, which is clearly not the case in
the present reactions.
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Green Chem., 2015, 17, 2774–2779 | 2779