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Alkylation of Schiff’s bases

Consequently, Dehmlow and coworkers modified the cinchona alkaloid structure to elucidate the role of each ofthe structural motifs of cinchona alkaloid-derived chiral phase-transfer catalysts in asymmetric reactions. Thus, the quinoline nucleus of cinchona alkaloid was replaced with various simple or sterically bulky substituents, and the resulting catalysts were screened in asymmetric reactions (Scheme 7.2). The initial results using catalysts 8-11 in the asymmetric borohydride reduction of pivalophenone, the hydroxylation of 2-ethyl-l-tetralone and the alkylation of SchifF s base each exhibited lower enantiomeric excesses than the corresponding cinchona alkaloid-derived chiral phase-transfer catalysts [14]. [Pg.137]


See other pages where Alkylation of Schiff’s bases is mentioned: [Pg.141]    [Pg.143]    [Pg.284]    [Pg.284]   
See also in sourсe #XX -- [ Pg.259 ]




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Of Schiff bases

S-Alkylation

S-alkylations

Schiff s bases

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