Reaktion #165734

Reaktionsgleichung

mixture

N-[(2Z)-5-tert-butyl-3-[(2R)-tetrahydrofuran-2-ylmethyl]-1,3-thiazol-2(3H)-ylidene]-2-formyl-5-(trifluoromethyl)benzamide

cyanoborohydride

(S)-pyrrolidin-2-ylmethanol

acetic acid

→

N-[(2Z)-5-tert-butyl-3-[(2R)-tetrahydrofuran-2-ylmethyl]-1,3-thiazol-2(3H)-ylidene]-2-{[(2S)-2-(hydroxymethyl)pyrrolidin-1-yl]methyl}-5-(trifluoromethyl)benzamide

Ausbeute 38.0%

Lösungsmittel

dichloromethane

methyl alcohol

Reaktionsbedingungen

Aufarbeitung

1. 1
   FiltrationThe reaction was filtered
2. 2
   Einengenconcentrated
3. 3
   Sonstigethe residue was purified by preparative HPLC on a Phenomenex Luna Combi-HTS C8(2) column (5 μm, 100 Å, 2.1 mm×30 mm)
4. 4
   Sonstigeat a flow rate of 2.0 mL/min (0-0.1 min 10% A, 0.1-2.6 min 10-100% A, 2.6-2.9 min 100% A, 2.9-3.0 min 100-10% A. 0.5 min post-run delay)

Vorschrift

In a vial (5 mL), a mixture of Example 375C (88 mg, 0.200 mmol), support-bound cyanoborohydride resin (0.256 g, 0.599 mmol), (S)-pyrrolidin-2-ylmethanol (60 mg, 0.593 mmol), and acetic acid (18 mg, 0.300 mmol) in dichloromethane (1 mL) and methyl alcohol (1 mL) was shaken on an orbit shaker for 2 hr. The reaction was filtered, concentrated and the residue was purified by preparative HPLC on a Phenomenex Luna Combi-HTS C8(2) column (5 μm, 100 Å, 2.1 mm×30 mm), using a gradient of 10-100% acetonitrile (A) and 0.1% trifluoroacetic acid in water (B), at a flow rate of 2.0 mL/min (0-0.1 min 10% A, 0.1-2.6 min 10-100% A, 2.6-2.9 min 100% A, 2.9-3.0 min 100-10% A. 0.5 min post-run delay) in 38% yield as TFA salt. 1H NMR (300 MHz, CD3OD) δ ppm 1.41 (s, 9H) 1.72-1.81 (m, 1H) 1.88-1.99 (m, 2H) 2.05-2.20 (m, 3H) 2.27-2.41 (m, 1H) 3.34-3.42 (m, 1H) 3.52-3.66 (m, 1H) 3.67-3.82 (m, 4H) 3.85-3.96 (m, 1H) 4.36-4.46 (m, 3H) 4.57 (d, J=12.69 Hz, 1H) 4.86-4.93 (m, 2H) 7.28 (s, 1H) 7.76-7.82 (m, 1H) 7.87-7.94 (m, 1H) 8.73-8.75 (m, 1H); MS (DCI/NH3) m/z 526 (M+H)+. Anal. calcd calcd C26H34F3N3O3S.1.9 CF3CO2H: C, 48.22; H, 4.87; N, 5.66. Found: C, 48.28; H, 4.63; N, 5.67.

Quelle