4-Nitrobenzoic Acid → (6S,9R)-6-(2,3-difluorophenyl)-6-hydroxy-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridin-9-yl 4-nitrobenzoate

HRID 1879373노트

반응식

HRID 1879373 반응식
[F:1][C:2]1[C:7]([F:8])=[CH:6][CH:5]=[CH:4][C:3]=1[C@:9]1([OH:21])[CH2:19][CH2:18][C@H:17]([OH:20])[C:12]2=[N:13][CH:14]=[CH:15][CH:16]=[C:11]2[CH2:10]1.[N+:22]([C:25]1[CH:33]=[CH:32][C:28]([C:29](O)=[O:30])=[CH:27][CH:26]=1)([O-:24])=[O:23].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O>O1CCCC1>[N+:22]([C:25]1[CH:26]=[CH:27][C:28]([C:29]([O:20][C@H:17]2[C:12]3=[N:13][CH:14]=[CH:15][CH:16]=[C:11]3[CH2:10][C@@:9]([C:3]3[CH:4]=[CH:5][CH:6]=[C:7]([F:8])[C:2]=3[F:1])([OH:21])[CH2:19][CH2:18]2)=[O:30])=[CH:32][CH:33]=1)([O-:24])=[O:23]

참가 물질

6

반응물 4

HCID 61084-Nitrobenzoic AcidHCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 58467984(6S,9S)-6-(2,3-difluorophenyl)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridine-6,9-diol

생성물 1

HCID 58468003(6S,9R)-6-(2,3-difluorophenyl)-6-hydroxy-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridin-9-yl 4-nitrobenzoate

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

In a 250 mL round-bottom flask was dissolved (6S,9S)-6-(2,3-difluorophenyl)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridine-6,9-diol (458 mg, 1.572 mmol) (azeotroped with dry benzene) in tetrahydrofuran (8 mL) to give a light orange solution. 4-Nitrobenzoic acid (394 mg, 2.358 mmol) and triphenylphosphine (619 mg, 2.358 mmol) were added under nitrogen. Diisopropyl azodicarboxylate (0.464 mL, 2.358 mmol) was added dropwise. The mixture was allowed to stir overnight. After 15 h, LCMS showed complete conversion, but the desired product was a minor component. It was concentrated to a light yellow oil and directly purified by FCC (5% ethyl acetate/hexanes to 100%) to afford the desired product (125 mg, 18%) as a white solid. MS(ESI)[M+H+]=441.20.

후처리

  1. customto give a light orange solution
  2. waitAfter 15 h

출처 및 근거

ORD 기록
ord-bf4f56cefd6c4951b37598efdd3f57b7
출처 데이터셋
uspto-grants-2012_11
특허 번호
US08314117B2

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