73568-75-9Relevant academic research and scientific papers
Aromatic Sulphonation. Part 73. Behaviour of Three 9-Alkylanthracenes containing One Side-chain α-Hydrogen in Dioxan-SO3 Complex in Dioxan as Sulphonating Medium
Griendt, Freek van de,Cerfontain, Hans
, p. 19 - 22 (2007/10/02)
The reactions of 9-isopropyl-, 9-s-butyl-, and 9-cyclohexyl-anthracene with dioxan-SO3 in dioxan at 17 deg C lead to three types of products, viz. 9-alkenylanthracenes (2), unsaturated sulphonic acids (3), and seven-membered ring sultones (4).The 9-alkenylanthracenes (2) result from a redox reaction between the 9-alkylanthracenes and SO3 and the unsaturated sulphonic acids (3) from the subsequent sulphonation of (2).The seven-membered ring sultones are formed from the ?-complex (resulting from addition of SO3 to the 10-position of the original substrate) by a 1,2-hydride shift from the side-chain C-α to C-9.
