An exceptionally short synthesis of novel indolizidine-, quinolizidine-, and piperidine-based iminosugars from unprotected 2-deoxy-d-ribose by intramolecular 1,3-dipolar cycloaddition of sugar-derived N-(3-alkenyl)nitrones has been accomplished. The use of the 2-deoxy carbohydrate also enabled us to confirm the previously proposed mechanism for the alteration of the stereochemical course of the intramolecular 1,3-dipolar cycloaddition observed for an unprotected sugar-derived nitrone. Biological assays of the six new iminosugars revealed a slight inhibition activity of the indolizidine derivative 7a, whereas, interestingly, the two quinolizidine iminosugars 5a and 5b appeared to be weak glycosidase activators.
机构:
Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
SIMM, SOMCL, Shanghai 201203, Peoples R ChinaCapital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
Du, Chengtang
Li, Fulong
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SIMM, SOMCL, Shanghai 201203, Peoples R China
China Pharmaceut Univ, Dept Med Chem, Nanjing 210009, Peoples R ChinaCapital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
Li, Fulong
Zhang, Xuefeng
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SIMM, SOMCL, Shanghai 201203, Peoples R ChinaCapital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
Zhang, Xuefeng
Hu, Wenxiang
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Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R ChinaCapital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
Hu, Wenxiang
Yao, Qizheng
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China Pharmaceut Univ, Dept Med Chem, Nanjing 210009, Peoples R ChinaCapital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
Yao, Qizheng
Zhang, Ao
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Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R ChinaCapital Normal Univ, Dept Chem, Beijing 100048, Peoples R China