تفاعل #1755488

معادلة التفاعل

(R)-6-(4-chlorophenyl)-3-(4-(2-cyclopropyl-2-hydroxyethoxy)-3-methoxyphenyl)-thieno[3,2-d]pyrimidin-4(3H)-one

diisopropylcarbodiimide

N-(t-butoxycarbonyl)-L-valine

→

title compound

(S)—((R)-2-(4-(6-(4-Chlorophenyl)-4-oxothieno[3,2-d]pyrimidin-3(4H)-yl)-2-methoxyphenoxy)-1-cyclopropylethyl) 2-amino-3-methylbutanoate

المذيبات

CH2Cl2

CH2Cl2

ظروف التفاعل

المعالجة

1. 1
   غسيلwashed with aq NaHCO3
2. 2
   استخلاصAfter extracting the aqueous layer with CH2Cl2
3. 3
   غسيلthe combined organic layers were washed sequentially with water and brine
4. 4
   تجفيفdried over Na2SO4
5. 5
   ترشيحfiltered
6. 6
   تركيزthe filtrate concentrated under reduced pressure
7. 7
   أخرىThe residue was purified by flash chromatography (silica gel, EtOAC/hexane 0 to 40% gradient)

الإجراء التجريبي

A mixture of (R)-6-(4-chlorophenyl)-3-(4-(2-cyclopropyl-2-hydroxyethoxy)-3-methoxyphenyl)-thieno[3,2-d]pyrimidin-4(3H)-one described in Example 1 (1.3 g, 2.33 mmol), diisopropylcarbodiimide (0.88 g, 6.99 mmol), 4-dimethylaminopyridine (142 mg, 1.16 mmol) and N-(t-butoxycarbonyl)-L-valine (1.52 g, 6.99 mmol) in CH2Cl2 (10 mL) was stirred at rt for 19 h. By LCMS analysis no starting alcohol remained. The suspension was diluted with CH2Cl2 and washed with aq NaHCO3. After extracting the aqueous layer with CH2Cl2, the combined organic layers were washed sequentially with water and brine, dried over Na2SO4, filtered and the filtrate concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, EtOAC/hexane 0 to 40% gradient) to afford the title compound (1.12 g) as a white solid. 1H NMR (CDCl3) δ 0.41-0.46 (m, 1H), 0.49-0.53 (m, 1H), 0.58-0.63 (m, 1H), 0.64-0.68 (m, 1H), 0.925 (d, J=7 Hz), 3H), 0.99 (d, J=7 Hz), 1.16-1.19 (m, 1H), 1.44 (s, 9H), 2.19-2.23 (m, 1H), 3.86 (s, 3H), 4.23-4.32 (m, 3H), 4.67-4.71 (m, 1H), 5.06 (d, J=2 Hz, 1H), 6.92-6.95 (m, 2H), 7.04 (d, J=2 Hz, 1H), 7.26 (s, 2H), 7.45 (d, J=2 Hz), 7.54 (s, 1H), 7.66 (d, J=2 Hz, 2H), 8.16 (s, 1H). LCMS (ES): m/z 669 [M+H].

المصدر