反应 #70606

反应方程式

tetramethylammonium 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

3-furaldehyde

→

Compound 170

收率 64.4%

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

收率 64.4%

反应条件

后处理

1. 1
   workup.ADDITIONTrietheylamine (5.0 μL) was added
2. 2
   其他The mixture quenched with saturated aqueous sodium bicarbonate (10 mL)
3. 3
   萃取extracted with dichloromethane (50 mL)
4. 4
   其他The organic layer was dried
5. 5
   过滤filtered through Celite®
6. 6
   浓缩concentrated in vacuo
7. 7
   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 90:10-0:100 H2O:MeCN)

实验过程

A 50-mL round bottom flask was charged with Compound 167 (20.0 mg, 0.032 mmol) and dichloroethane (4.0 mL). Trietheylamine (5.0 μL) was added followed by 3-furaldehyde (6.0 mg, 0.06 mmol) and tetramethylammonium triacetoxyborohydride (11.8 mg, 0.045 mmol). The mixture was stirred at room temperature for 3 h. The mixture 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 90:10-0:100 H2O:MeCN) to give 13.7 mg of Compound 170 as a yellow solid. 1H NMR (300 MHz, CDCl3) δ 7.50-7.64 (m, 5 H), 7.43 (d, J=7.2 Hz, 1 H), 7.13 (d, J=8.2 Hz, 1 H), 7.00-7.06 (m, 3 H), 6.79 (d, J=8.0 Hz, 1 H), 6.56 (s, 1 H), 5.12-5.23 (m, 1 H), 4.61-4.74 (m, 1 H), 3.87 (s, 3 H), 3.84 (s, 3 H), 3.63-3.75 (m, 4 H), 3.41-3.51 (m, 2 H), 2.94-3.35 (m, 4 H), 2.53-2.65 (m, 1 H), 2.18-2.30 (m, 1 H), and 1.46-1.71 (m, 2 H); MS (ES+) 665 (M+1).

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