反应 #70607

反应方程式

cyclopentanone

sodium triacetoxyborohydride

Compound 167

(R)-thiophene-2-sulfonic acid [4-(3,4-dimethoxy-phenyl)-4-(1,3-dioxo-4-piperazin-1-yl-1,3-dihydro-isoindol-2-yl)-butyl]-amide

dichloroethane

Triethylamine

→

Compound 193

收率 48.8%

(R)-thiophene-2-sulfonic acid [4-[4-(4-cyclopentyl-piperazin-1-yl)-1,3-dioxo-1,3-dihydro-isoindol-2-yl]-4-(3,4-dimethoxy-phenyl)-butyl]-amide

收率 48.8%

反应条件

后处理

1. 1
   其他The mixture was quenched with saturated aqueous sodium bicarbonate (10 mL)
2. 2
   萃取extracted with dichloromethane (50 mL)
3. 3
   其他The organic layer was dried
4. 4
   过滤filtered through Celite®
5. 5
   浓缩concentrated in vacuo
6. 6
   其他The crude oil was purified on a on a Gilson HPLC with a reversed phase Kromasil column (10 u, 100 Å C18, column length 250×50 mm, gradient 75:25-0:100 H2O:MeCN)

实验过程

A 50-mL round bottom flask was charged with Compound 167 (10.0 mg, 0.016 mmol) and dichloroethane (2.3 mL). Triethylamine (2.5 μL, 0.018 mmol) was added followed by cyclopentanone (7.1 μL, 0.06 mmol) and sodium triacetoxyborohydride (4.7 mg, 0.022 mmol). The mixture was stirred at room temperature for 3 h. The mixture was quenched with saturated aqueous sodium bicarbonate (10 mL) and extracted with dichloromethane (50 mL). The organic layer was dried using Na2SO4, filtered through Celite®, and concentrated in vacuo. The crude oil was purified on a on a Gilson HPLC with a reversed phase Kromasil column (10 u, 100 Å C18, column length 250×50 mm, gradient 75:25-0:100 H2O:MeCN) to give 5.1 mg of Compound 193 as a yellow solid. 1H NMR (300 MHz, CDCl3) δ 7.53-7.64 (m, 3 H), 7.44 (d, J=7.2 Hz, 1 H), 7.14 (d, J=8.2 Hz, 1 H), 6.91-7.06 (m, 3 H), 6.79 (d, J=8.0 Hz, 1 H), 6.56 (s, 1 H), 5.13-5.19 (m, 1 H), 4.51-4.64 (m, 1 H), 3.88 (s, 3 H), 3.85 (s, 3 H), 3.73-3.83 (m, 2 H), 3.42-3.64 (m, 2 H), 2.78-3.22 (m, 6 H), 2.48-2.61 (m, 1 H), 1.88-2.31 (m, 4 H), 1.47-1.69 (m, 4 H), and 1.27-1.33 (m, 4 H); MS (ES+) 653 (M+1).

来源