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Phenylselenenyl chloride is used in the preparation of (cyclobut-1-enylselanyl)benzene. It is an important versatile reagent used in organic synthesis. Further, it serves as a useful synthon for 2-amino alcohols.
ɑ-Phenylselenoketones can be prepared, e.g. by reaction of Li enolates with phenylselenenyl halides, and conversion to the corresponding unsaturated ketones by selenoxide elimination: J. Am. Chem. Soc., 97, 5434 (1975). Oxidizing agents include H2O2, mCPBA or periodate. For application to ß-diketones, see: Org. Synth. Coll., 6, 23 (1988):
ß-Keto lactones undergo a similar sequence to give unsaturated lactones: J. Org. Chem., 46, 2920 (1981). -Lactones can be converted to dihydrofurans and thence to furans: J. Org. Chem., 40, 542 (1975). Similarly, cyclohexenones can be aromatized to phenols by selenenylation of the enolate and oxidation with mCPBA: Tetrahedron Lett., 23, 51 (1982). For a comprehensive review of the preparation of ɑß-unsaturated carbonyl compounds and nitriles byselenoxide elimination, see: Org. React., 44, 1 (1993).
Adds to alkenes to give trans-chloroselenylated dervatives via a selenium bridged cation: J. Org. Chem., 39, 428 (1974); Tetrahedron Lett., 4977 (1978). Also widely applied in cyclization of various molecules containing olefinic double bonds, e.g. unsaturated alcohols undergo seleno-etherification: J. Am. Chem. Soc., 102, 3784 (1980); Tetrahedron Lett., 31, 5917 (1990).
δ-Unsaturated ketones undergo cyclofunctionalization, providing access to vic-functionalized cyclopropanes and oxygenated heterocycles: Synlett, 965 (1994):
Reacts with alkenylboronic acids in ionic liquids to give (Z) and (E) vinyl selenides: Tetrahedron Lett., 43, 373 (2002).
Tancock, J.; Wirth, T. Selenium-Mediated Synthesis of Tetrasubstituted Naphthalenes through Rearrangement. Molecules 2015, 20 (6), 10866-10872.
U. A. Kshirsagar. Recent developments in the chemistry of quinazolinone alkaloids. Org. Biomol. Chem. 2015, 13 (36), 9336-9352.
Dichiarazioni di rischio (UE): H301-H331-H373
Toxic if swallowed. Toxic if inhaled. May cause damage to organs through prolonged or repeated exposure.
Dichiarazioni precauzionali: P260-P301+P310a-P304+P340-P311a-P405-P501a
Do not breathe dust/fume/gas/mist/vapours/spray. IF SWALLOWED: Immediately call a POISON CENTER/doctor IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Call a POISON CENTER/doctor. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.