Ethyl Acetate → D-(+)-Glucal

Beteiligte Stoffe

Reaktionsschritte

The Tri-O-Acetyl-D-Glucal [SM-A](100 g, 367 mmol) is dissolved in dry MeOH [1.5 L], and then NaOMe (110 mmol, 5.95 g) is added into reaction mixture. Within about 20 minutes, TLC (40% EtOAc/60% hexanes & 100% EtOAc) confirmed de-acetylated glucal. The reaction is quenched with 50WX4 cation exchange resin until pH is near 7.0 by pH strip paper. The mixture is filtered and evaporated to dryness under vacuum to yield syrupy glucal intermediate IntA1(59 g). Theoretical yield 100 g×(146/272) 53.7 g TLC IntA1Rf=0.1, SiO2, 100% Ethyl Acetate

Herkunft & Nachweise