64409-70-7Relevant articles and documents
Facile synthesis of carboxylic anhydrides using 4,5-dichloro-2-[(4-nitrophenyl)sulfonyl]pyridazin-3(2H)-one
Kim, Jeum-Jong,Park, Yong-Dae,Song Lee, Woo,Cho, Su-Dong,Yoon, Yong-Jin
, p. 1517 - 1520 (2003)
A novel and facile synthesis of carboxylic anhydrides from carboxylic acid using 4,5-dichloro-2-[(4-nitrophenyl)sulfonyl]pyridazin-3(2H)-one (2) is presented. Treatment of aliphatic or aromatic carboxylic acids with 2 in the presence of base in organic solvents gave the corresponding anhydrides in good or excellent yields.