Oblon, Spivak, McClelland, Maier & Neustadt
Process for producing halogenated sulfone
 The present invention provides a process for preparing halogenated sulfones by reacting a halogenating agent with a salt of a hydroxysulfone. The halogenated sulfones are useful as an intermediate for vitamin A or its carboxylic acid esters employed as medicines or feed additives. 
Kuraray Company, Ltd.
C C C C
C07C C07C C07C C07C
inventional additional inventional inventional
Toshiki Takashi Shigeaki Kazuo Michio
Mori Onishi Suzuki Yamamoto Takigawa