4
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4806-4813. (e) Xu, B.; Peng, B.; Cai, B.; Wag, S.; Lv, X. Adv. Synth.
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Conclusions
In summary, a concise method for the preparation of
carbodiimides through the DMAP-catalyzed reaction of
thioureas with (Boc)2O has been developed. The method
shows several attractive merits such as rapid, mild
conditions, simple work-up procedure, and low waste
generation. Particularly, no more organic wastes are
generated beside the S=C=O and t-BuOH, which can be
easily removed from the reaction mixture. The shortcoming
of the present method is that it only suitable for the synthesis
diarylcarbodiimides.
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Acknowledgments
We are grateful for financial support from the Jiangsu Key
Laboratory of Advanced Catalytic Materials and Technology
(BM2012110), and Advanced Catalysis and Green
Manufacturing Collaborative Innovation Center.
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Supplementary Material
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General synthetic procedures, characteristic data, and
NMR spectra of the products can be found, in the online
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