Thiosalicylic acids react with 2-substituted N,N-dialkyl acetamides to give 3-substituted-N,N-dialkyl-2-amino-4-oxothiochromenes 13. N-Alkyl 2-piperidone and analogous caprolactams give derivatives of 1,2,3,4-tetrahydrothiochromeno[2,3-b]pyridin-5-one 16a–16d and 7,8,9,10-tetrahydro-6H-5-thia-6-aza-cyclohepta-[b]naphthalen-11-one 16e, 16f. 2-Mercaptonicotinic acid gave a 1,2,3,4-tetrahydro-9-thia-1
硫代水杨酸与 2-取代的 N,N-二烷基乙酰胺反应生成 3-取代的-N,N-二烷基-2-
氨基-4-氧代
噻吩 13。N-烷基 2-
哌啶酮和类似的己内酰胺生成 1,2 的衍
生物, 3,4-tetrahydrothiochromeno[2,3-b]pyridin-5-one 16a-16d 和 7,8,9,10-tetrahydro-6H-5-thia-6-aza-cyclohepta-[b]naphthalen-11-一个 16e、16f。2-Mercaptonicotinic acid 得到 1,2,3,4-tetrahydro-9-thia-1,8-diazaanthracen-10-one 16g 和 1,2,3,4-tetrahydro-9-thia-1,8-二氮杂
蒽-10-
硫酮 16h。