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Cyclization in the presence of dichlorodimethylsilane and triflic acid leads to 2,5-dimethyl-1,3,4-oxadiazole. The active species, formed in situ, is dimethylsilyl ditriflate: Synth. Commun., 18, 1247 (1988). The same cyclization can be effected by HMDS in combination with F-: Synth. Commun., 19, 2321 (1989)./n
Gefahrenhinweise (EU): H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.