Réaction #1702056

Équation de réaction

4-[(1R,3S)-3-[[(1R)-1-(4-fluoro-3-methoxy-phenyl)ethyl]amino]cyclopentyl]benzonitrile

trimethylsilylazide

→

title compound

(1S,3R)—N-[(1R)-1-(4-fluoro-3-methoxy-phenyl)ethyl]-3-[4-(1H-tetrazol-5-yl)phenyl]cyclopentanamine

Solvants

toluene

Conditions de réaction

Traitement

1. 1
   workup.ADDITION9.5 ml, 72 mmol, dropwise addition)
2. 2
   FiltrationThe precipitate was filtered off
3. 3
   Autrethe filtrate was evaporated
4. 4
   Autrepurified by flash chromatography (gradient of 0-10%, MeOH in DCM containing 2% NEt3)
5. 5
   AutreThe product thus obtained
6. 6
   Autrewas precipitated from EtOH
7. 7
   workup.DISSOLUTIONredissolved in DCM
8. 8
   Extractionextracted with aqueous HCl (pH 1)
9. 9
   Filtrationthe resulting precipitate was filtered off
10. 10
    Autredried

Mode opératoire

4-[(1R,3S)-3-[[(1R)-1-(4-fluoro-3-methoxy-phenyl)ethyl]amino]cyclopentyl]benzonitrile (5.1 g, 14.4 mmol) in toluene (160 ml) was treated with trimethylsilylazide (9.5 ml, 72 mmol, dropwise addition) followed by SnBu2O (717 mg, 2.88 mmol). The reaction mixture was stirred at 118° C. overnight. The precipitate was filtered off, and the filtrate was evaporated and purified by flash chromatography (gradient of 0-10%, MeOH in DCM containing 2% NEt3). The product thus obtained was precipitated from EtOH, redissolved in DCM and extracted with aqueous HCl (pH 1). The aqueous phase was neutralized to pH 5-6 with NaOH aq. (1M), and the resulting precipitate was filtered off and dried to afford the title compound. 1H NMR (300 MHz, DMSO) δ 7.89 (d, J=8.2 Hz, 2H), 7.39 (dd, J=8.3, 1.8 Hz, 1H), 7.33-7.23 (m, 3H), 7.14-7.03 (m, 1H), 4.38 (q, J=6.5 Hz, 1H), 3.86 (s, 3H), 3.45-3.32 (m, 1H), 3.09-2.95 (m, 1H), 2.38-2.25 (m, 1H), 2.10-1.64 (m, 5H), 1.56 (d, J=6.7 Hz, 3H).

Source