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Grignard reagents cerium chloride system

The addition reactions are usually carried out at -78 °C, except for reactions of the Grignard re-agent/cerium chloride system (Section 1.8.4), which are conducted at 0 °C. A substrate is added to the well-stirred organocerium reagent and the mixture is stirred until the reaction is complete. Work-up is carried out in the usual manner quenching with dilute HCl or dilute AcOH and extraction with a suitable organic solvent. When the substrates are acid sensitive, work-up using tetramethylenediamine is recommended. ... [Pg.233]

The Grignard reagent/cerium chloride system has been applied to practical organic syntheses. A typical example is shown in Scheme 27. In sharp contrast to the reaction in the presence of cerium cUoride, the Grignard reagent alone affords only a 2% yield of the adduct. [Pg.248]

See other pages where Grignard reagents cerium chloride system is mentioned: [Pg.231]    [Pg.244]    [Pg.231]   
See also in sourсe #XX -- [ Pg.244 ]

See also in sourсe #XX -- [ Pg.244 ]

See also in sourсe #XX -- [ Pg.244 ]

See also in sourсe #XX -- [ Pg.244 ]

See also in sourсe #XX -- [ Pg.244 ]



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