@article{oai:nagasaki-u.repo.nii.ac.jp:00010485,
 author = {Yokota, Kenichirou and Hagimori, Masayori and Mizuyama, Naoko and Nishimura, Yasuhisa and Fujito, Hiroshi and Shigemitsu, Yasuhiro and Tominaga, Yoshinori},
 journal = {Beilstein Journal of Organic Chemistry},
 month = {Feb},
 note = {New fluorescent compounds, benzo[4,5]thieno[3,2-d]pyrimidine 5,5-dioxides (3a-g), 2-amino-4-methylsulfanylbenzo[4,5]thieno[3,2-d]pyrimidine (6), and 2-amino-4-methylsulfanyl-7-methoxybenzo[4,5]furo[3,2-d]pyrimidine (7), were synthesized in good yields from heterocyclic ketene dithioacetals (1a-c) and guanidine carbonate (2a) or (S)-methylisothiourea sulfate (2b) in pyridine under reflux. Among the fused pyrimidine derivatives, compound 3c, which has an amino group at the 2-position and a benzylamino group at the 4-position of the pyrimidine ring, showed the strongest solid-state fluorescence. The absorption and emission properties of the compounds were quantitatively reproduced by a series of ab initio quantum-chemical calculations., Beilstein Journal of Organic Chemistry, 8, pp.266-274; 2012},
 pages = {266--274},
 title = {Synthesis, solid-state fluorescence properties, and computational analysis of novel 2-aminobenzo[4,5]thieno[3,2-d]pyrimidine 5,5-dioxides},
 volume = {8},
 year = {2012}
}