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The corresponding urea derivatives derived from ephedrine and pseudoephedrine have been synthesized and tested in the ring opening of azlactones, albeit with only moderate success
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The corresponding urea derivatives derived from ephedrine and pseudoephedrine have been synthesized and tested in the ring opening of azlactones, albeit with only moderate success:, Berkessel A, Mukherjee S, Mller T N., Cleemann F, Roland K, Brandenburg M, Neudörfl [nl]J.-M, Lee J, Org. Biomol. Chem. 2006 4 4319
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37
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58449111212
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Examples can be found in ref. 10 and 11c. This trend, however, is not universally valid for reactions catalyzed by thioureas as shown in
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Examples can be found in ref. 10 and 11c. This trend, however, is not universally valid for reactions catalyzed by thioureas as shown in:, Wang F, Liu X, Cui X, Xiong Y, Zhou X, Feng X, Chem. Eur. J. 2009 15 589
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