Toluene → (1S,2R,4aS,8aS)-1-(3-methoxy-5-methylphenoxymethyl)-2,5,5,8a-tetramethyl-decahydronaphthalen-2-ol

関与物質

反応手順

(1S,2R,4aS,8aS)-1-(hydroxymethyl)-2,5,5,8a-tetramethyl-decahydronaphthalen-2-ol (3) (prepared according to Kuchkova et al., Synthesis, 1045-1048, 1997) (0.24 g, 1.0 mmol), Cu(I)I (0.019 g, 0.10 mmol)) and 3,4,7,8-tetramethyl-[1,10]phenanthroline (0.047 g, 0.20 mmol)) were added to an oven dried sealed tube, sealed with a rubber septum, and flushed with a stream of nitrogen for 15 min. Anhydrous toluene (5 mL), anhydrous diglyme (1 mL) and 1-iodo-3-methoxy-5-methylbenzene (2) (0.273 g, 1.10 mmol) were added via a syringe with vigorous stirring under a stream of nitrogen at room temperature. The rubber septum was replaced with the Teflon cap and the sealed tube was heated at 120° C. in an oil bath for 18 h. The reaction was allowed to cool to room temperature, and then quenched with ethyl acetate. The resulting suspension was filtered through a celite pad. The filtrate and the washings were concentrated to dryness. The crude product was purified by flash chromatography (Hexanes/EtOAc, 9:1) to yield (1S,2R,4aS,8aS)-1-(3-methoxy-5-methylphenoxymethyl)-2,5,5,8a-tetramethyl-decahydronaphthalen-2-ol (4) (0.33 g, 92% yield) as a pale yellow solid.

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