CHEN Jia-wei, XIAO Ren-liang. SYNTHESIS OF BAL-RESIN AND ITS USE IN MONOFUNCTIONALIZED WITTIG REACTION OF SYMMETRICAL DIALDEHYDES[J]. Acta Polymerica Sinica, 1986,(6):467-469.
CHEN Jia-wei, XIAO Ren-liang. SYNTHESIS OF BAL-RESIN AND ITS USE IN MONOFUNCTIONALIZED WITTIG REACTION OF SYMMETRICAL DIALDEHYDES[J]. Acta Polymerica Sinica, 1986,(6):467-469.DOI:
Reacting cross-linked chloromethylated polystyrenes on 2
3-dimercaptopropanol (BAL) and sodium hydroxide under phase-transfer condition
a new type of insoluble polymer support containing a sulfhydryl and a hydroxyl group was synthesized (Ⅲ) (sulfhydryl capecity = 2.5 mmol/g). This BAL-resin being made to monoprotect symmetrical dialdehydes (terephthalal-dehyde)
an aldenhyde-resin was obtained (Ⅳ) (aldehyde group capacity =1.2 mmol/g). under the catalysis of phase-transfer
in benzene-wate system at room temperature and sodium hy-droxide as base
the free aldehyde group reacted on Witting reagents to give a p-formylstilbenes (VII) (yield=85.4%).