反应详情

1.47 g (5.25 mmoles) of the chroman obtained in Example 8 were heated at 100° C. with 3.2 g of benzyl bromide, 1.5 g of Na2CO3 and 7 ml of dimethylformamide for 13 hours, and water was then added. This mixture was extracted with heptane, after which the crude product obtained from the extract phase was chromatographed on 50 g of silica gel using a mixture of 1 part by volume of ether and 2 parts by volume of heptane. The following fractions were obtained: F1=1.28 g; F2 (mixed fraction)=0.13 g; F3 (starting material)=0.23 g.

1. extractionThis mixture was extracted with heptane