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Synthesis and Cytotoxicity of 9‐Substituted Benzo[ de ]chromene‐7,8‐dione and 5‐Benzyl‐9‐substituted Benzo[ de ]chromene‐7,8‐dione

✍ Scribed by Huang, Shi‐Liang; Luo, Yi; Huang, Zhi‐Shu; Wang, Xing‐Yuan; Bu, Xian‐Zhang; Liu, Pei‐Qing; Ma, Lin; Xie, Bing‐Fen; Liu, Zong‐Chao; Li, Yue‐Ming; Chan, Albert S. C.

Book ID
126864938
Publisher
Taylor and Francis Group
Year
2006
Tongue
English
Weight
166 KB
Volume
36
Category
Article
ISSN
0039-7911

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## Abstract Treatment of difluoro or chloro fluoro‐substituted benzyl bromides 5a‐c with zinc dust in tetrahydro‐furan leads to the corresponding benzylic zinc bromides 6a‐c. These organometallics on treatment with chlorosubstituted heterocyclic esters 4A and 4B mediated by nickel catalysis undergo