569-08-4Relevant articles and documents
Highly selective three-step synthesis of rhein in chloroaluminate molten salt: preclusion of the Hayashi rearrangement
Gonnot, Vanessa,Antheaume, Cyril,Nicolas, Marc,Mioskowski, Charles,Baati, Rachid
experimental part, p. 6205 - 6210 (2010/03/24)
An expeditious, three-step synthesis of rhein (2) was optimized starting from bis(N, N-diethyl)-5-methoxybenzene-1,3-dicarboxamide. The key final step, involving deprotection/cyclization of orihobenzoylbenzoic acid 9 in acidic chloroaluminate molten salts
Reaction of 2-acetoxy-3-chloro and 2,3-diacetoxy naphthoquinones with 1,3-dioxy and 1,1,3-trioxy butadienes
Cameron, Donald W.
, p. 1165 - 1171 (2007/10/03)
Reaction of 2-acetoxy-3-chloro naphthoquinones towards the 1,3-dioxy diene (2) and the 1,1,3-trioxy diene (9) was examined. The competing influence of the acetoxy and chloro substituents was assessed from the regiochemistry of the resulting Diels-Alder ch