Reaktion #2177272

Reaktionsgleichung

Sodium tert-butoxide

N-(4-bromobenzyl)-4-(5-cyano-7-isopropyl-1,3-benzoxazol-2-yl)benzamide

N-(4-Bromobenzyl)-4-(5-cyano-7-isopropyl-1,3-benzoxazol-2-yl)benzamide

3-[4-(trifluoromethyl)phenyl]pyrrolidine

acetone

→

title compound

Ausbeute 53.0%

4-(5-cyano-7-isopropyl-1,3-benzoxazol-2-yl)-N-(4-{3-[4-(trifluoromethyl)phenyl]pyrrolidin-1-yl}benzyl)benzamide

Ausbeute 53.0%

Lösungsmittel

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturUpon cooling
2. 2
   Einengenthe mixture was then concentrated in vacuo
3. 3
   Sonstigepurified via flash chromatography on a Biotage Horizon, 40 M column
4. 4
   Wascheneluting with 1 column volume of 100% hexanes

Vorschrift

Sodium tert-butoxide (10 mg), N-(4-bromobenzyl)-4-(5-cyano-7-isopropyl-1,3-benzoxazol-2-yl)benzamide (24 mg, EXAMPLE 1), and 3-[4-(trifluoromethyl)phenyl]pyrrolidine (31 mg) were dissolved in toluene (5.0 mL). To this mixture was added bispalladiumtribenzylidene acetone (10 mg) and 1,1′-binaphthalene-2,2′-diylbis(diphenylphosphine) (12 mg). The mixture was heated to 150° C. for 25 min in a microwave reactor. Upon cooling, the mixture was then concentrated in vacuo, taken up in dichloromethane, and purified via flash chromatography on a Biotage Horizon, 40 M column, eluting with 1 column volume of 100% hexanes, followed by a linear gradient of ethyl acetate in hexanes from 0 to 100% over 10 column volumes, followed by 4 column volumes of 100% ethyl acetate to provide the title compound (16 mg, 53%). Mass spectrum (ESI) 609.1 (M+1). 1H NMR (500 MHz, CDCl3): δ 8.31 (d, J=8.5 Hz, 2H), 7.95 (d, J=8.5 Hz, 2H), 7.94 (s, 1H), 7.59 (d, J=8.0 Hz, 2H), 7.51 (s, 1H), 7.39 (d, J=8.0 Hz, 2H), 7.29 (d, J=8.4 Hz, 2H), 6.60 (d, J=8.4 Hz, 2H), 6.33 (t, J=4.0 Hz, 1H), 4.59 (d, J=5.3 Hz, 2H), 3.75 (t, J=8.4 Hz, 1H), 3.57 (m, 5H), 2.47 (m, 1H), 2.15 (m, 1H), 1.46 (d, J=6.9, 6H).

Quelle