반응 #69229

반응 방정식

4-(1H-pyrazol-4-yl)-7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]-pyrimidine

ACN

(2E)-3-[5-(diethoxymethyl)-3-thienyl]acrylonitrile

DBU

→

3-[5-(diethoxymethyl)-3-thienyl]-3-[4-(7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]propanenitrile

수율 43.2%

용매

water

반응 조건

후처리

1. 1
   workup.ADDITIONwas added
2. 2
   추출the product was extracted with ethyl acetate
3. 3
   세척The combined extracts were washed with saturated sodium chloride
4. 4
   건조dried over magnesium sulfate
5. 5
   여과filtered
6. 6
   농축concentrated
7. 7
   기타The crude residue was purified by flash column chromatography on silica gel eluting (50% EtOAc/Hexane)

실험 절차

To a solution of 4-(1H-pyrazol-4-yl)-7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]-pyrimidine (200 mg, 0.0007 mol) in ACN (2 mL, 0.04 mol) and (2E)-3-[5-(diethoxymethyl)-3-thienyl]acrylonitrile (160 mg, 0.00067 mol) (mixture of regioisomers) DBU (80 μL, 0.0005 mol) was added. The reaction was stirred overnight than water was added and the product was extracted with ethyl acetate. The combined extracts were washed with saturated sodium chloride, dried over magnesium sulfate, filtered and concentrated. The crude residue was purified by flash column chromatography on silica gel eluting (50% EtOAc/Hexane) to give 3-[5-(diethoxymethyl)-3-thienyl]-3-[4-(7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]propanenitrile (160 mg, 43%). 1H NMR (400 MHz, CDCl3): δ □8.92 (s, 1H), 8.41 (s, 1H), 8.29 (b, 1H), 7.45(d, 1H), 7.41(d, 1H), 7.15 (s, 1H), 7.05 (d, 1H), 6.82 (m, 1H), 5.74 (d, 2H), 3.74 (m, 2H), 3.71 (m, 8H), 3.59 (m, 1H), 1.32 (m, 4H), 0.95 (m, 2H), −0.08 (s, 9H); MS(ES):553 (M+1).

출처