Cycloaddition reactions. A new type of cycloadduct from a substituted 2-vinylthiophen and dmad |
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| Affiliation: | 1. Department of Food Technology, University of North Bengal, Darjeeling, West Bengal, India;2. Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, India;1. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No. 92 West-Da Zhi Street, Harbin 150001, Heilongjiang, China;2. Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi''an University of Technology, Xi''an 710048, Shaanxi, China |
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| Abstract: | Cycloaddition reactions between 2-(1-cyanoallyl)thiophen and the dienophiles diethyl azodicarboxylate, N-phenylmaleimide , methyl propiolate, and dimethyl acetylenedicarboxylate are reported. Products include simple benzo[b] thiophen carboxylates (13,19) and reduced derivatives (8,9,10,12,18), as a mixture of diastereoisomers, except in the adduct with diethyl azodicarboxylate. With dimethyl acetylenedicarboxylate a new type of tricyclic compound was also found (20). |
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