反应详情

温度

0 °C

16.8 ml of thionyl chloride are added dropwise, over the space of approximately 30 min, to 10 ml of 2-methoxybenzyl alcohol (Fluka, Buchs, Switzerland) and 53.76 g of diisopropylaminomethylpolystyrene (polyhunig base, see Ex. 44a)) in 200 ml of abs. ether. After the mixture has been stirred at 0° C. for a further 1.5 h, it is filtered with suction and the filtrate is concentrated on a RE and under HV. The residue is purified by chromatography on silica gel (eluent: hexane/ethyl acetate, 6:1). TLC Rf (hexane:ethyl acetate=4:1)=0.5. 1H-NMR (200 MHz, CDCl3): 7.42-7.24 (m, 2H); 7.0-6.84 (m, 2H); 4.68 (s, 2H); 3.9 (s, 3H).

1. filtrationit is filtered with suction
2. concentrationthe filtrate is concentrated on a RE and under HV
3. customThe residue is purified by chromatography on silica gel (eluent: hexane/ethyl acetate, 6:1)