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. 2015 Oct 8;9:5553–5567. doi: 10.2147/DDDT.S94037

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© 2015 Zhang et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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Reagents and conditions: (a) CH₃COCl, MeOH; (b) SnCl₂, EtOH; (c) HCl, anhydrous EtOAc; (d) TBTU, Et₃N, DCM; (e) BTC, dioxane, reflux; (f) Et₃N, DCM; (g) NH₂OK, MeOH.

Abbreviations: TBTU, 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate; DCM, dichloromethane; BTC, bis(trichloromethyl) carbonate.