Journal
TETRAHEDRON LETTERS
Volume 47, Issue 19, Pages 3315-3319Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.03.003
Keywords
benzylammonitroethenes; (protonated) nitrile oxide; nitrile oxide 1,3-dipolar cycloaddition; superacid; acenaphthylene isoxazoline
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At low temperature in trifluoromethanesulfonic acid, 1-benzylamino-1-methylthio-2-nitroethene derivatives form hydroxynitrilium ions (or O-protonated nitrile oxides) observed by NMR. Quenching with water leads to the formation of a reactive nitrile oxide, dipole which undergoes an unexpected INOC reaction leading to new 3-methylsulfanyl-8a,8b-dihydro-5H-1-oxa-2,4-diazaacenaphthylenes. (c) 2006 Elsevier Ltd. All rights reserved.
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