Réaction #69229

Équation de réaction

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

Rendement 43.2%

Solvants

water

Conditions de réaction

Traitement

1. 1
   workup.ADDITIONwas added
2. 2
   Extractionthe product was extracted with ethyl acetate
3. 3
   LavageThe combined extracts were washed with saturated sodium chloride
4. 4
   Séchagedried over magnesium sulfate
5. 5
   Filtrationfiltered
6. 6
   Concentrationconcentrated
7. 7
   AutreThe crude residue was purified by flash column chromatography on silica gel eluting (50% EtOAc/Hexane)

Mode opératoire

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).

Source