Alonso, Diego A. published the artcile3,5-Bis(trifluoromethyl)phenyl sulfones in the synthesis of 3,5-disubstituted cyclopent-2-enones, Category: bromides-buliding-blocks, the publication is ARKIVOC (Gainesville, FL, United States) (2007), 243-262, database is CAplus.
3,5-Bis(trifluoromethyl)phenyl sulfones {BTFP sulfones; 3,5-(CF3)2C6H3S(O)2CH2R; R = Ph, C6H4NO2-4, CO2iPr, CN, P(O)(OEt)2; 1a–e}, easily synthesized from 3,5-bis(trifluoromethyl)benzenethiol, react under PTC with (Z)-1,4-dichloro-2-butene to afford the cyclopentenyl sulfones {3; 4-(3,5-(CF3)2C6H3S(O)2)-4-Rcyclopentene}, which suffer further diastereoselective alkene epoxidation with MCPBA giving BTFP sulfonyl cyclopentene oxides with the dominant isomer having the sulfonyl away from the oxygen bridge in good yields. These epoxides are convenient precursors of 3,5-disubstituted cyclopent-2-enones (e.g. 5-bromo-3-phenyl-2-cyclopenten-1-one), which result from epoxide ring-opening with different nucleophiles and final successive oxidation-BTFP sulfinate elimination.
ARKIVOC (Gainesville, FL, United States) published new progress about 66197-72-6. 66197-72-6 belongs to bromides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyl (bromomethyl)phosphonate, and the molecular formula is C5H12BrO3P, Category: bromides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary