Abstract
A facile method of synthesizing 8-oxoprotoberberines is described from 6-benzoyl-5,6,7,8-tetrahydro-[1,3]dioxolo[4,5-g]isoquinoline-5-carbaldehyde via acid-mediated cyclization or from 2-(2-iodophenethyl)isoquinolin-1(2H)-one via the Heck reaction. The present method offers several advantages, such as good yields and a simple procedure.
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Acknowledgments
This work was supported by the Chinese National Science & Technology Major Project “Key New Drug Creation and Manufacturing Program” (grants 2009ZX09301-001 and 2009ZX09102-022), the National Natural Science Foundation of China (grants 30925040, 90713046, 30772638, and U0633008), CAS Foundation (grants KSCX2-YW-R-168 and KSCX2-YW-R-179), Shanghai Commission of Science and Technology (grants 08DZ2291300, 09DZ2291200, and 09431902100) and the National Hi-Tech Research and Development Program Grant of China (grants 2007AA09Z402, 2007AA02Z147, and 2008AA02Z105).
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A. Chen and K. Zhao contributed equally to this work.
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Chen, A., Zhao, K., Zhang, H. et al. Synthesis of 8-oxoprotoberberines using acid-mediated cyclization or the Heck reaction. Monatsh Chem 143, 825–830 (2012). https://doi.org/10.1007/s00706-011-0656-6
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DOI: https://doi.org/10.1007/s00706-011-0656-6