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Paper | Regular issue | Vol 87, No. 1, 2013, pp.115-123
Published online, 6th December, 2012
DOI: 10.3987/COM-12-12627
Cyclocondensation Reaction of Mesoionic 4-Trifluoroacetyl-1,3-oxazolium-5-olates with Hydroxylamine affording 6-Trifluoromethyl-5,6-dihydro-4H-1,2,4-oxadiazin-6-ols

Ryosuke Saijo, Ken-ichi Kurihara, Kazuki Akira, and Masami Kawase*

*Faculty of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan


Mesoionic 4-trifluoroacetyl-1,3-oxazolium-5-olates (1) undergo tandem addition of hydroxylamine to afford 6-trifluoromethyl-1,2,4-oxadiazin-6-ols (3) in high yields.