2-Tetralone → 2-(s)-(1,2,3,4-Tetrahydro-naphthalen-2-ylamino)-pentanoic acid [5-(5-methoxy-1,5-dimethyl-hexyl)-thiazol-2-yl]-amide

関与物質

反応手順

A mixture of 2-(S)-amino-pentanoic acid [5-(5-methoxy-1,5-dimethyl-hexyl)-thiazol-2-yl]-amide HCl salt (600 mg, 1.59 mmol) and 2-tetralone (253 mg, 2.07 mmol) in dichloroethane was stirred at room temperature overnight. Sodium triacetoxyborohydride (530 mg, 2.5 mmol) was added and the mixture was stirred at room temperature overnight. The mixture was quenched with water, adjusted pH to around 10 and extracted with methylene chloride. The organic layer was concentrated to dryness. The residue was purified by SCX column after eluting with 1 M NH3/methanol and concentrated to dryness to give 620 mg that was purified by Shimadzu HPLC to give 2-(S)-(1,2,3,4-tetrahydro-naphthalen-2-ylamino)-pentanoic acid [5-(5-methoxy-1,5-dimethyl-hexyl)-thiazol-2-yl]-amide, LC-MS RT=2.2 min, M+1=472.5 as an oil and 2-(S)-(1,2,3,4-tetrahydro-naphthalen-2-ylamino)-pentanoic acid [5-(5-hydroxy-1,5-dimethyl-hexyl)-thiazol-2-yl]-amide, retention time, LC-MS RT=1.9 min, M+1=458.4 as a beige glass form.

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