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Sealed tube promoted coupling of camptothecin and norcantharidin acid ester and their preliminary biological activity evaluation in vitro

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Abstract

A facile synthetic method was developed for the novel acid-sensitive camptothecin norcantharidin acid ester derivatives 3 in sealed tube. This method offers several advantages including high yield and simple work procedure which can be extended for the synthesis of analogs. The new synthetic compounds 3 have shown better activity against several tumor cell lines in vitro test.

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Scheme 3

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Abbreviations

CPT:

Camptothecin

TMS:

Tetramethylsilane

MTT:

3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide

EDCI:

(3-dimethylaminopropyl) ethyl-carbodiimide monohydrochloride

DMAP:

4-dimethylaminopyridine

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Acknowledgements

I am very grateful for the finacial support from Joint fund project of Guizhou Provincial department of Science and Technology (QianKeHe LH Zi [2014]7545), (QianKeHe LH Zi [2015]7531), Science and Technology Department of Guizhou Province (QKHSY [2017]2844) and (QKHSY [2015]3030). I am also thankful for Dr. Yuqi He’s useful explanation on HPLC and LC/MS spectra data.

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Correspondence to Chang K. Zhao.

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Wang, X.H., Yang, F.H., Zhao, C.K. et al. Sealed tube promoted coupling of camptothecin and norcantharidin acid ester and their preliminary biological activity evaluation in vitro. Med Chem Res 27, 406–411 (2018). https://doi.org/10.1007/s00044-017-2066-8

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  • DOI: https://doi.org/10.1007/s00044-017-2066-8

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