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Reagent for the oxy-selenation of alkenes in the presence of 2-3 equivalents of water and an acid catalyst: J. Am. Chem. Soc., 101, 3704 (1979). The trans-ß-hydroxy selenide products are useful intermediates, e.g. in the synthesis of allylic alcohols by selenoxide elimination. In general, the reagent is superior to the corresponding halides in intramolecular cyclization reactions with unsaturated acids, urethanes, etc. Even suitably disposed ketones may undergo cyclization of the enol form, in the presence of SnCl4: J. Chem. Soc., Chem. Commun., 1251, 1252 (1982):/n
Hazard Statements: H301-H331-H373
Toxic if swallowed. Toxic if inhaled. May cause damage to organs through prolonged or repeated exposure.
Precautionary Statements: P260-P301+P310a-P304+P340-P311a-P405-P501a
Do not breathe dust/fume/gas/mist/vapours/spray. IF SWALLOWED: 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.