反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
CONDITIONS
反应条件
- 温度
- 80 °C
PROCEDURE
实验过程
To a round-bottom flask equipped with a stir bar was added tert-butyl ((2S,3S)-3-((R)-hex-5-en-2-yloxy)-1-((2S,4R)-4-hydroxy-2-(((1R,2S)-1-(((1-methylcyclopropyl)sulfonyl)carbamoyl)-2-vinylcyclopropyl)carbamoyl)pyrrolidin-1-yl)-1-oxopentan-2-yl)carbamate (all material from step 4, 569 mg, 0.869 mmol) and DCE (100 mL). The solution was sparged with nitrogen for 30 min. and then to the solution was added (1,3-Bis-(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(o-isopropoxyphenylmethylene)ruthenium (“Hoveyda-Grubbs Catalyst 2nd Generation”, 27 mg, 0.043 mmol). The solution was stirred at 80° C. for 2 h and then cooled to 45° C. and stirred for 3 days. The solution was concentrated in vacuo and the resulting residue was subjected to silica gel purification (hexanes:acetone 80:20 to 40:60). The product containing fractions were pooled; concentrated; and re-subjected to silica gel chromatography (hexanes:acetone 80:20 to 40:60) to afford tert-butyl ((2R,6S,7S,9R,13aS,14aR,16aS,Z)-7-ethyl-2-hydroxy-9-methyl-14a-(((1-methylcyclopropyl)sulfonyl)carbamoyl)-5,16-dioxo-2,3,5,6,7,9,10,11,13a,14,14a,15,16,16a-tetradecahydro-1H-cyclopropa[i]pyrrolo[1,2-e][1,5,8]oxadiazacyclopentadecin-6-yl)carbamate as a light-brown solid foam (90 mg, 10% over 5 steps). 1H-NMR (500 MHz, CD3OD) δ 8.93 (s, 1H), 5.61 (td, J=10.1, 6.2 Hz, 1H), 5.03 (t, J=10.3 Hz, 1H), 4.58 (br. s., 1H), 4.47-4.37 (m, 2H), 3.92 (br. s., 2H), 3.86-3.79 (m, 1H), 3.58-3.49 (m, 1H), 2.75 (q, J=9.5 Hz, 1H), 2.64-2.52 (m, 1H), 2.23-2.11 (m, 2H), 1.92-1.80 (m, 2H), 1.75 (dd, J=8.5, 5.5 Hz, 1H), 1.66-1.60 (m, 1H), 1.59-1.52 (m, 2H), 1.49 (s, 4H), 1.43 (s, 9H), 1.41-1.32 (m, 2H), 1.15 (d, J=6.3 Hz, 3H), 0.95 (t, J=7.4 Hz, 3H), 0.88-0.84 (m, 2H).
WORKUP
后处理
- customTo a round-bottom flask equipped with a stir bar
- customThe solution was sparged with nitrogen for 30 min.
- temperaturecooled to 45° C.
- stirringstirred for 3 days
- concentrationThe solution was concentrated in vacuo
- customthe resulting residue was subjected to silica gel purification (hexanes:acetone 80:20 to 40:60)
- additionThe product containing fractions
- concentrationconcentrated