@article{oai:soar-ir.repo.nii.ac.jp:00012511,
 author = {Kakehi,  Akikazu and Suga,  Hiroyuki and Okumura,  Yukihisa and Nishi,  Takashi},
 issue = {1},
 journal = {HETEROCYCLES},
 month = {Jan},
 note = {The reactions of 5-acyl-3-(1-pyridinio)thiophene-2-thiolates with dimethyl acetylenedicarboxylate in xylene at the reflux temperature afforded the corresponding 2-unsubstituted 5-acylthieno[3,2-d]thiazoles in 25―69% yields together with dimethyl phthalate as another fragmentation product. In a few reactions, the unexpected products, dimethyl 2-[2-acylthieno[2’,3’:2,3]-1,4-thiazino[4,5-a]pyrrol-8-ylidene]succinate derivatives, were also isolated, though their yields were very low., Article, HETEROCYCLES. 81(1):175-184 (2010)},
 pages = {175--184},
 title = {Preparation of New Nitrogen-Bridged Heterocycles. 68. One-Pot Synthesis of 4-Substituted 5-Acylthieno[3,2-d]thiazole Derivatives},
 volume = {81},
 year = {2010}
}