87149-60-8Relevant academic research and scientific papers
PHOTOCHEMICAL REACTIONS OF 4-METHOXY-1-THIOCOUMARIN AND SYNTHESIS OF 1,2-DIHYDROCYCLOBUTABENZOTHIOPYRAN-3(3H)-ONES
Kaneko, Chikara,Naito, Toshihiko,Ohashi, Tetsuo
, p. 1275 - 1278 (2007/10/02)
4-Methoxy-1-thiocoumarin reacts photochemically with monosubstituted olefins to give the head-to-tail adducts: 1-substituted 8b-methoxy-1,2,2a,8b-tetrahydrocyclobutabenzothiopyran-3(3H)-ones, which eliminate methanol under appropriate conditions to give 1-substituted 1,2-dihydrocyclobutabenzothiopyran-3(3H)-ones.Interesting photochemical ring-contraction reactions of 4-methoxy-1-thiocoumarin to benzothiophene derivatives are also reported.
