反应详情

67 Ml. of n-butyl lithium (1.9 M in n-hexane) was run into a stirred suspension of triphenylmethylphosphonium bromide (42.7 g., 0.12 M) at room temperature in tetrahydrofuran (300 ml.) under nitrogen. To this stirred solution a solution of the 3,4α-di-O-isopropylidine derivative of 2-methyl-3-hydroxy-4-hydroxymethyl-5-formylpyridine (24.7 gm. 0.119 M) in tetrahydrofuran (300 ml.) was added dropwise over 1 hour. The reaction was aged 1 hour at room temperature and then refluxed for 4 hours.

1. temperaturerefluxed for 4 hours