197364-90-2Relevant academic research and scientific papers
Preparation of New Nitrogen-Bridged Heterocycles. 43.1 Synthesis and Reaction of 5aH-Pyrido[1,2-d][1,3,4]thiadiazepine Derivatives
Kakehi, Akikazu,Ito, Suketaka,Ishida, Fumihito,Tominaga, Yoshinori
, p. 7788 - 7793 (1997)
Reactions of some 1-pyridinio- and 1-(4-methylpyridinio)(arenethiocarbonyl)amidates with dimethyl acetylenedicarboxylate in chloroform afforded neither the expected dimethyl 2-aryl-5aH-pyrido-[1,2-d][1,3,4]thiadiazepine-4,5-dicarboxylates nor their intramolecular Diels-Alder adducts, but gave novel rearranged products, dimethyl 4-aryl-5-thia-2,3-diazatricyclo[4.3.2.0 2,7]undeca-3,8,10-triene-6,11-dicarboxylates in low to moderate yields. On the other hand, similar reactions of 1-(3-methylpyridinio)- and 1-(2-methylquinolinio)(arenethiocarbonyl)amidates with the same reagent provided 1:1 primary adducts, dimethyl 2-aryl-6-methyl-5aH-pyrido[1,2-d][1,3,4]thiadiazepine-4,5-dicarboxylates and dimethyl 2-aryl-5a-methyl-5aH-[1,3,4]thiadiazepino[4,5-α]quinoline-4,5- dicarboxylates, respectively.
