반응 #67656

반응 방정식

sodium triacetoxyborohydride

product

N-[(2R)-2-(thiazol-5-ylmethoxycarbonylamino)-3-phenylpropyl]-N-[(2S)-2-(thiazol-5-ylmethoxycarbonylamino)-3-phenylpropyl]amine

trimethylacetaldehyde

NaHCO3

acetic acid

→

title compound

수율 13.0%

N-(2,2-dimethylpropyl)-N-[(2R)-2-(thiazol-5-ylmethoxycarbonylamino)-3-phenylpropyl]-N-[(2S)-2-(thiazol-5-ylmethoxycarbonylamino)-3-phenylpropyl]amine

수율 13.0%

용매

1,2-dichloroethane

반응 조건

후처리

1. 1
   workup.STIRRINGAfter stirring at ambient temperature for 24 hours
2. 2
   추출extract with ethyl acetate (3×10 mL)
3. 3
   세척wash with brine (20 mL)
4. 4
   건조dried over sodium sulfate
5. 5
   여과filtered
6. 6
   농축the filtrate was concentrated
7. 7
   기타The residue was purified on a silica gel cartridge
8. 8
   세척eluting with chloroform

실험 절차

The product from Example 26D (87.5 mg, 0.155 mmol) in 1,2-dichloroethane (3.0 mL) was treated with trimethylacetaldehyde (21 μL, 0.186 mmol) at ambient temperature. After stirring for 15 minutes, the mixture was treated with acetic acid (11 μL, 0.181 mmol) followed by sodium triacetoxyborohydride (53 mg, 0.248 mmol). After stirring at ambient temperature for 24 hours, the mixture was treated with aqueous 10% NaHCO3 (5.0 mL) and extract with ethyl acetate (3×10 mL). The ethyl acetate extracts were combined, wash with brine (20 mL), dried over sodium sulfate, filtered, and the filtrate was concentrated. The residue was purified on a silica gel cartridge eluting with chloroform to provide the title compound (12.5 mg, 13%). 1H NMR (CDCl3) δ 8.73 (s, 2H), 7.79 (s, 2H), 7.28-7.05 (m, 10H), 5.20 (s, 4H), 4.88-4.76 (br s, 2H), 3.90-3.66 (m, 2H), 2.87 (dd, 2H), 2.75-2.60 (m, 2H), 2.47 (d, 4H), 2.17 (s, 2H), 0.78 (s, 9H); MS (ESI+) m/z 636 (M+H)+.

출처