While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 29683-23-6, Tetrahydro-2H-thiopyran-4-ol.
Reference of 29683-23-6, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 29683-23-6, name is Tetrahydro-2H-thiopyran-4-ol, molecular formula is C5H10OS, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.
Example 9[ (3S) -6-{ [ (3S) -7-{4- [ (1, l-dioxidotetrahydro-2H-thiopyran-4- yl) oxy] -2, 6-dimethylphenyl } -2 , 3-dihydro-l-benzofuran-3- yl] amino} -2, 3-dihydro-l-benzofuran-3-yl] acetic acid; [0682][0683]To a solution of methyl [ (3S) -6-{ [ (3S) -7-bromo-2, 3- dihydro-l-benzofuran-3-yl] (trifluoroacetyl) amino} -2, 3-dihydro- l-benzofuran-3-yl] acetate (6.00 g, 12.0 mmol) , [4-(methoxymethoxy) -2, 6-dimethylphenyl] boronic acid (3.02 g, 14.4 mmol) and 2 M aqueous sodium carbonate solution (18.0 mL, 36.0 mmol) in toluene (40 mL) were added tris (dibenzylideneacetone)dipalladium (0) (439 mg, 0.480 mmol) and dicyclohexyl (2′ , 6′ -dimethoxybiphenyl-2-yl) phosphane (788 mg, 1.92 mmol) under an argon atmosphere, and the mixture was stirred at 1000C overnight. The reaction mixture was cooled to room temperature, filtered through celite, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane: ethyl acetate = 95:5 – 70:30) to give a yellow oil (7.65 g) . To a solution of the obtained oil(7.65 g) in methanol (40 mL) was added 10% hydrogen chloride containing methanol solution (3.8 mL) , and the mixture was stirred at 400C for 2 hr. The reaction mixture was neutralized with saturated aqueous sodium hydrogen carbonate, diluted with distilled water, and extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give a solid. This was triturated with hexane-ethyl acetate to give a white solid (6.47 g) . To a solution of the obtained solid (2.00 g) , tetrahydro-2H-thiopyran-4-ol (480 mg, 4.06 mmol) and triphenylphosphine (1.26 g, 4.81 mmol) in tetrahydrofuran (19 mL) was added diethyl azodicarboxylate (40% toluene solution, 2.19 mL, 4.81 mmol). The mixture was stirred at room temperature for 2 hr, diethyl azodicarboxylate (2.19 mL) and triphenylphosphine (1.26 g) were added, and the mixture was further stirred for 1 hr. Diethyl azodicarboxylate (2.19 mL) and triphenylphosphine (1.26 g) were further added, and the mixture was stirred for 10 min and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane: ethyl acetate = 95:5 – 70:30) to give a white solid (1.86 g). To a solution of the obtained solid (1.86 g) in ethyl acetate (15 mL) was added m- chloroperbenzoic acid (65%, 1.5O g, 5.65 mmol) under ice- cooling, and the mixture was stirred at room temperature for 3 hr. To the reaction mixture was added saturated aqueous sodium hydrogen carbonate, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane: ethyl acetate = 95:5 – 30:70) to give a white solid (1.57 g) . To a mixed solution of the obtained solid (1.57 g) in tetrahydrofuran (15 mL) and methanol (7.5 mL) was added 1 M aqueous sodium hydroxide solution (7.01 mL) , and the mixture was stirred at 50C for 2 hr. The reaction mixture was neutralized with 1 M hydrochloric acid, diluted with distilled water, and extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give a white solid. This was triturated with hexane-ethyl acetate, and recrystallized from ethyl acetate-heptane to give the title compound (911 mg, yield 44%) as a white solid.1H NMR (300 MHz, CDCl3) delta 2.07 (6H, d, J = 9.0 Hz), 2.27-2.71 (5H, in), 2.81 (IH, dd, J = 16.6, 5.3 Hz), 2.88-3.04 (2H, m) , 3.35-3.55 (2H, m) , 3.74-3.88 (IH, m) , 4.23-4.42 (2H, m) , 4.62-4.83 (3H, m) , 5.17-5.31 (IH, m) , 6.09-6.21 (2H, m) , 6.69 (2H, s), 6.95-7.11 (3H, m) , 7.32-7.44 (IH, m) . MS m/z 564 (M + H)+. melting point 176C.
While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 29683-23-6, Tetrahydro-2H-thiopyran-4-ol.
Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; NEGORO, Nobuyuki; TERAO, Yoshito; MIKAMI, Satoshi; YUKAWA, Tomoya; WO2010/143733; (2010); A1;,
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