반응 #471682

반응 방정식

2-(4-chloromethyl-phenoxy)-benzothiazole

(S,S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester

triethylamine

→

title compound

수율 71.1%

(S,S)-5-[4-(Benzothiazol-2-yloxy)-benzyl]-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester

수율 71.1%

용매

CH3CN

반응 조건

후처리

1. 1
   농축concentrated
2. 2
   기타The crude residue was then partitioned between CH2Cl2 (800 mL) and saturated (satd.) aqueous (aq.) NaHCO3 (200 mL)
3. 3
   기타The organic layer was separated
4. 4
   건조dried (Na2SO4)
5. 5
   여과filtered
6. 6
   농축concentrated
7. 7
   기타Purification by silica gel flash chromatography (10% to 40% ethyl acetate (EtOAc) in hexanes)

실험 절차

To a stirred solution of 2-(4-chloromethyl-phenoxy)-benzothiazole (15.3 g, 55.3 mmol) and (S,S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (13.2 g, 66.4 mmol) in CH3CN (200 mL) was added triethylamine (Et3N) (11.5 mL, 82.9 mmol). The resulting solution was stirred at rt for 24 h and then concentrated. The crude residue was then partitioned between CH2Cl2 (800 mL) and saturated (satd.) aqueous (aq.) NaHCO3 (200 mL). The organic layer was separated, dried (Na2SO4), filtered and concentrated. Purification by silica gel flash chromatography (10% to 40% ethyl acetate (EtOAc) in hexanes) afforded the title compound as a white foam (17.2 g, 71%). MS (ESI): mass calcd. for C24H27N3O3S, 437.18; m/z found, 438.2 [M+H]+. 1H NMR (500 MHz, CDCl3, mixture of rotamers): 7.73 (d, J=7.1 Hz, 1H), 7.66 (d, J=7.1 Hz, 1H), 7.42 (d, J=8.1 Hz, 2H), 7.38 (m, 1H), 7.32-7.24 (br m, 3H), 4.40 (br m, 0.5H), 4.26 (br m, 0.5H), 3.76 (br d, J=9.7 Hz, 2H), 3.63 (br d, J=10.5 Hz, 0.5H), 3.50 (br m, 1H), 3.46 (m, 0.5H), 3.18 (br m, 1H), 2.93 (br d, J=8.8 Hz, 0.5H), 2.88 (br d, J=9.4 Hz, 0.5H), 2.73 (br d, J=9.2 Hz, 0.5H), 2.55 (br d, J=9.2 Hz, 0.5H), 1.87 (br t, J=8.8 Hz, 1H), 1.74 (br d, J=9.3 Hz, 0.5H), 1.68 (br d, J=9.3 Hz, 0.5H), 1.47 (s, 9H).

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