تفاعل #531860
ord-bb51b08245c84391aac7c7617248b2e1
معادلة التفاعل
الكواشف
المذيبات
ظروف التفاعل
المعالجة
- 1استخلاصThen the product was extracted with ether (30 mL)
- 2غسيلthe ether solution was washed with 1 N NaOH aqueous solution (20 mL) and water (30 mL)
- 3تجفيفdried over Na2SO4
- 4تركيزconcentrated
- 5أخرىThe residue was purified by column chromatography on silica gel eluting with hexane and ethyl acetate (3:1)
الإجراء التجريبي
A mixture of 10-hydroxydecanoic acid (0.25 g, 1.33 mmol; 11-hydroxyundecanoic acid for compound 881 and 12-hydroxydodecanoic acid for compound 882), ethyl bromide (0.16 g, 1.46 mmol), and lithium carbonate (0.11 g, 1.46 mmol) in DMF (25 mL) was stirred at 70 C for 6 h. Then the product was extracted with ether (30 mL), and the ether solution was washed with 1 N NaOH aqueous solution (20 mL) and water (30 mL), dried over Na2SO4, and concentrated. The residue was purified by column chromatography on silica gel eluting with hexane and ethyl acetate (3:1) to give 10-hydroxydecanoic acid ethyl ester (80 mg, 28%). This alcohol was coupled with 4-(3-adamantan-1-yl-ureido)butyric acid 822 by using EDCI/DMAP coupling reagent to give 880 (0.11 g, 60%) as a solid: 1H NMR (CDCl3) 1.24-1.32 (13H, m), 1.62-1.68 (10H, m), 1.80 (2H, quint, J=6.9 Hz), 1.94-1.97 (6H, m), 2.05-2.07 (3H, m), 2.28 (2H, t, J=6.9 Hz), 2.36 (2H, t, J=6.9 Hz), 3.16 (2H, q, J=6.9 Hz), 4.05-4.14 (5H, m), 4.25 (1H, s); LC-MS (ESI) m/z calcd for C27H46N2O5 [M+H]+ 479.34. found [M+H]+ 479.29; mp 60-61 C. Anal. Calcd for C27H46N2O5: C, 67.75; H, 9.69; N, 5.85. Found: C, 68.33; H, 9.92; N, 5.97.