The addition reactions between 2-methyl-1-aza-2-thianaphthalene (1) or 9-alkyl-10-aza-9-thiaphenanthrenes (2) with methyl propiolate afforded novel 1:2-adducts (3) or (4), respectively, whose structures have been confirmed by an X-ray crystal structure determination of (4a).
M. Hori, T. Kataoka, H. Shimizu, K. Matsuo, A. Sugimoto, K. Ikedo, K. Hamada, H. Ogura and H. Takayanagi, J. Chem. Soc., Chem. Commun., 1987, 385 DOI: 10.1039/C39870000385
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