Acetic Acid → HCID 22871221, 화합물

HRID 52286노트

반응식

HRID 52286 반응식
[CH:1]1([NH:6][C@@H:7]2[CH2:12][C:11]3[C:13]([O:18][CH3:19])=[CH:14][CH:15]=[C:16]([F:17])[C:10]=3[O:9][CH2:8]2)[CH2:5][CH2:4][CH2:3][CH2:2]1.CC(O)=O.[C:24]1(=O)[CH2:27][CH2:26][CH2:25]1.[BH3-]C#N.[Na+]>CO>[CH:1]1([N:6]([C@@H:7]2[CH2:12][C:11]3[C:13]([O:18][CH3:19])=[CH:14][CH:15]=[C:16]([F:17])[C:10]=3[O:9][CH2:8]2)[CH:24]2[CH2:27][CH2:26][CH2:25]2)[CH2:2][CH2:3][CH2:4][CH2:5]1

참가 물질

6

반응물 4

HCID 176Acetic AcidHCID 14496CyclobutanoneHCID 5003444Sodium cyanoborohydrideHCID 22871220(R)-3-(N-cyclopentylamino)-8-fluoro-5-methoxy-3,4-dihydro-2H-1-benzopyran

생성물 1

HCID 22871221HCID 22871221, 화합물수율 53%

시약·촉매·용매 1

HCID 887Methanol용매

실험 절차

To a solution of (R)-3-(N-cyclopentylamino)-8-fluoro-5- methoxy-3,4-dihydro-2H-1-benzopyran (0.9 g, 3.4 mmol), HOAc (0.22 g, 3.6 mmol) and cyclobutanone (2g, 30 mmol) in methanol (25 mL), were NaCNBH3 (1 g, 16 mmol) added in portions at room temperature. After stirring for four days GC indicated 37% product. pH was adjusted to 5 (HOAc)and additional (1 g, 15 mmol) cyclobutanone was added. After stirring for further 6 days, GC indicated 64% conversion. The solvent was evaporated and the residue worked up by extraction. Flash chromatography (EtOAc/P-ether, 1+1), gave 0.53 g (53% yield) of the title compound as a colourless oil. GC/MS (70 eV) M=319 (3%).

후처리

  1. additionadded in portions at room temperature
  2. additionwas added
  3. customThe solvent was evaporated
  4. extractionthe residue worked up by extraction

출처 및 근거

ORD 기록
ord-da13a31426dc4cfcb1856c485413f595
출처 데이터셋
uspto-grants-1997_04
특허 번호
US05616610

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