反应详情

To a cold (5° C.) solution of 5-hydroxy-7-methyl-6-phenyl-2-naphthalenyl 4-methylbenzenesulfonate (239) (0.250 g, 0.62 mmol) in CHCl3 (5 mL) and MeOH (5 mL) was added nickel chloride hexahydrate (0.238 g, 1.24 mmol). To the above mixture sodium borohydrate (0.471 g, 12.4 mmol) was added portion-wise. The resulting black mixture was stirred at that temperature for 15 min. Reaction mixture was filtered through a pad of celite (washings were done with CHCl3). The filtrate was concentrated under reduced pressure to afford the crude product. The product was purified by column chromatography to afford 0.064 g (44%) of the title compound (86) as an oil. 1H NMR (400 MHz, CDCl3): δ 8.22 (d, J=8.0 Hz, 1H), 7.77 (d, J=8.0 Hz, 1H), 7.59-7.55 (m, 2H), 7.52-7.46 (m, 3H), 7.40-7.36 (m, 3H), 5.28 (s, 1H), 2.22 (s, 3H). LCMS (ESI) m/z (M+H)+.

1. customReaction mixture
2. filtrationwas filtered through a pad of celite (washings were done with CHCl3)
3. concentrationThe filtrate was concentrated under reduced pressure
4. customto afford the crude product
5. customThe product was purified by column chromatography