N-bromobutanimide → (S)-tert-butyl (1-((9-bromo-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate

HRID 1398293노트

반응식

HRID 1398293 반응식
[CH3:1][CH:2]([CH3:31])[CH2:3][C@H:4]([NH:23][C:24](=[O:30])[O:25][C:26]([CH3:29])([CH3:28])[CH3:27])[CH2:5][O:6][C:7]1[CH:8]=[CH:9][C:10]2[C:19]3[C:14](=[CH:15][N:16]=[CH:17][CH:18]=3)[C:13](=[O:20])[N:12]([CH3:21])[C:11]=2[CH:22]=1.[Br:32]N1C(=O)CCC1=O>C(#N)C.O>[Br:32][C:8]1[C:7]([O:6][CH2:5][C@@H:4]([NH:23][C:24](=[O:30])[O:25][C:26]([CH3:29])([CH3:28])[CH3:27])[CH2:3][CH:2]([CH3:31])[CH3:1])=[CH:22][C:11]2[N:12]([CH3:21])[C:13](=[O:20])[C:14]3[C:19]([C:10]=2[CH:9]=1)=[CH:18][CH:17]=[N:16][CH:15]=3

참가 물질

5

반응물 2

HCID 67184N-bromobutanimideHCID 86710306(S)-tert-butyl (4-methyl-1-((6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)pentan-2-yl)carbamate

생성물 1

HCID 86710307(S)-tert-butyl (1-((9-bromo-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate수율 68%

시약·촉매·용매 2

HCID 962Water용매HCID 6342Acetonitrile용매

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온도
85 °C

실험 절차

To a solution of (S)-tert-butyl (4-methyl-1-((6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)pentan-2-yl)carbamate (0.100 g, 0.235 mmol) (as prepared in Ex. 2, Part D) in anhydrous acetonitrile (5 mL) was added N-bromosuccinimide (0.042 g, 0.235 mmol) and the mixture was heated at 85° C. for 5 h. The reaction mixture was diluted with water (10 mL), extracted with ethyl acetate (2×20 mL). The combined organic layers were dried over sodium sulfate and evaporated under reduced pressure to afford crude product which was purified by preparative TLC (gradient of ethyl acetate and petroleum ether) to afford (S)-tert-butyl (1-((9-bromo-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate (80 mg, 0.159 mmol, 68% yield) as an off-white solid. LC/MS (ESI) m/e 504.2 [(M+H)+, calcd for C24H31BrN3O4 504.1]; LC/MS retention time (method A): tR=2.23 min.

후처리

  1. extractionextracted with ethyl acetate (2×20 mL)
  2. dry with materialThe combined organic layers were dried over sodium sulfate
  3. customevaporated under reduced pressure
  4. customto afford crude product which
  5. customwas purified by preparative TLC (gradient of ethyl acetate and petroleum ether)

출처 및 근거

ORD 기록
ord-cc124cf26e214ae999f7bbf0cd45e57d
출처 데이터셋
uspto-grants-2014_12
특허 번호
US08901305B2

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