反应详情

Benzyloxy acetyl chloride (24 gm, 86.95 mmol) was added drop-wise to a mixture of 2-(6-Hydroxynaphthalen-2-yl)-propionic acid methyl ester 6 (20 g, 86.95 mmol) and triethylamine (22.5 g, 222.35 mmol) in acetone (300 ml) and stirred for 2 hrs at room temp. Solids were filtered off, acetone distilled off, and water (100 ml) added. Crude 99 was extracted into chloroform, washed with 5% sodium bicarbonate (2×50 ml), water (2×50 ml), dried over sodium sulphate and distilled. Crude 99 was purified by recrystallising in chloroform:hexane (1:6) to get pure 99 (21 g, 63.9%) as a white powder. M.p: 58-60° C.

1. filtrationSolids were filtered off
2. distillationacetone distilled off
3. additionwater (100 ml) added
4. extractionCrude 99 was extracted into chloroform
5. washwashed with 5% sodium bicarbonate (2×50 ml), water (2×50 ml)
6. dry with materialdried over sodium sulphate
7. distillationdistilled
8. customCrude 99 was purified
9. customby recrystallising in chloroform:hexane (1:6)