A revised structure for the condensation product of 2-carbethoxycyclopentanone and ethyl cyanoacetate |
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| Affiliation: | 1. Department of Chemistry, College of Science, King Saud University, Girls Section, P.O. Box 2457, Riyadh 11495, Saudi Arabia;2. National Organization for Drug Control and Research, Cairo, P.O. 29, Egypt;3. Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk 71491, P.O. Box 741, Saudi Arabia;4. Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt |
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| Abstract: | The condensation product of 2-carbethoxycyclopentanone and ethyl cyanoacetate is ethyl 2-carbethoxycyclopentylidene cyanoacetate (IIa) and not the one described by Kon and Nanji. Similarly, 2-carbomethoxycyclopentanone and methyl cyanoacetate yield methyl 2-carbomethoxycyclopentylidene cyanoacetate (IIb). The by-products obtained in the first reaction are cyclopentylidene cyanoacetate (IV) and the enamine of 2-carbethoxycyclopentanone (VIa). |
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