138713-35-6Relevant articles and documents
Polar Cycloaddition of 2-Benzothiopyrilium Salts with Conjugated Dienes
Shimizu, Hiroshi,Miyazaki, Shojiro,Kataoka, Tadashi,Hori, Mikio,Muraoka, Osamu
, p. 3129 - 3140 (2007/10/02)
2-Benzothiopyrilium salts 4 and 6 underwent polar cycloaddition with conjugated dienes to afford benzo-fused bicyclic sulfonium salts 7 and 8, respectively, having sulfur at a bridgehead position, in good yields.The salt 4 bearing an electron-withdrawing