Novel synthesis of heterocyclic spirans by tandem cycloaddition to sulfur-containing heterocumulenes |
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| Authors: | Yoshiki Ohshiro Hitoshi Nanimoto Hiroyuki Tanaka Mitsuo Komatsu Toshio Agawa Noritake Yasuoka Yasushi Kai Nobutami Kasai |
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| Affiliation: | Department of Applied Chemistry, Faculty of Engineering, Osaka University Yamadaoka 2-1, Suita, Osaka 565, Japan |
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| Abstract: | Novel Ni(C0)4-promoted tandem cycloadditions of diphenylcyclo- propenone to isothiocyanates and to CS2 were found to provide new heterocyclic spirans, pyrroline-2-one-5-spiro-5′-thiolene-4′-ones and a thiolene-2-one-5-spiro-5′-thiolene-4′-one, respectively, in moderate yields. |
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