تفاعل #5499
ord-cd1d5c5dc1cf4e4bb0fa6676330d839a
معادلة التفاعل
المتفاعلات
الكواشف
ظروف التفاعل
المعالجة
- 1درجة الحرارةto warm up to room temperature
- 2غسيلthe organic layer is washed with 1N hydrochloric acid, saturated sodium bicarbonate
- 3تجفيفdried (MgSO4)
- 4أخرىthe solvent is evaporated
- 5أخرىThe product is purified by silica gel chromatography (80% ethyl acetate/hexane)
الإجراء التجريبي
The enantiomer of trans 3-(acetylthiomethyl)-2-oxo-1-azacyclodecane-10-carboxylic acid of Example 16(0.23 g, 0.80 mmol), 1-hydroxybenzotriazole (0.11 g, 0.80 mmol), 4-methylmorpholine (0.22 mL, 2.0 mmol), and L-hydroxyproline ethyl ester hydrochloride (0.16 g, 0.80 mmol) are dissolved in methylene chloride (5.0 mL), and the reaction is cooled to 0° C. To this solution is added N-[dimethylaminopropyl]-N'-ethylcarbodiimide hydrochloride (0.31 g, 1.60 mmol), and the reaction is allowed to warm up to room temperature and stirred overnight. The reaction is diluted with more methylene chloride, and the organic layer is washed with 1N hydrochloric acid, saturated sodium bicarbonate, dried (MgSO4), and the solvent is evaporated. The product is purified by silica gel chromatography (80% ethyl acetate/hexane) to give N-[[trans 3-(acetylthiomethyl)-2-oxo-1-aza-cyclodecan-10-yl]-carbonyl]-trans 4-hydroxy-L-proline ethyl ester as a single enantiomer, [α]D +5.73° (c=4.1 mg/ml, CH2Cl2) which is assigned the 3R, 10S configuration.