Nitric Acid → Acetic acid 7-benzyloxy-6-nitro-1,2,3,4-tetrahydronaphthalen-2-yl ester

HRID 643904

반응식

HRID 643904 반응식
[CH2:1]([O:8][C:9]1[CH:18]=[C:17]2[C:12]([CH2:13][CH2:14][CH:15]([O:19][C:20](=[O:22])[CH3:21])[CH2:16]2)=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[N+:23]([O-])([OH:25])=[O:24]>CC(O)=O.OS(O)(=O)=O.O.[N+]([O-])([O-])=O.[Cu+2].O.O.O.O.[N+]([O-])([O-])=O.[Cu+2].[N+]([O-])([O-])=O.[N+]([O-])([O-])=O>[CH2:1]([O:8][C:9]1[CH:18]=[C:17]2[C:12]([CH2:13][CH2:14][CH:15]([O:19][C:20](=[O:22])[CH3:21])[CH2:16]2)=[CH:11][C:10]=1[N+:23]([O-:25])=[O:24])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

참가 물질

6

반응물 2

HCID 944Nitric AcidHCID 66750626Acetic acid 7-benzyloxy-1,2,3,4-tetrahydronaphthalen-2-yl ester

생성물 1

HCID 66750447Acetic acid 7-benzyloxy-6-nitro-1,2,3,4-tetrahydronaphthalen-2-yl ester

시약·촉매·용매 3

HCID 1118Sulfuric Acid촉매HCID 167780Copper(II) nitrate hemipentahydrate촉매HCID 176Acetic Acid용매2회

실험 절차

To a solution of acetic acid 7-benzyloxy-1,2,3,4-tetrahydronaphthalen-2-yl ester (5.77 g, 19.5 mmol) in AcOH (30 mL) is added a solution of 90% HNO3 (3.0 mL, ca. 64 mmol) in AcOH (5 mL), copper(II) nitrate hemipentahydrate (3.71 g, 19.8 mmol) and conc. H2SO4 (3 drops) at room temperature. The mixture is stirred at room temperature for 1.5 h and partitioned between EtOAc and aq. KOH. The organic layer is dried over MgSO4, concentrated and chromatographed to afford acetic acid 7-benzyloxy-6-nitro-1,2,3,4-tetrahydronaphthalen-2-yl ester with some impurities. Crystallization from DCM-hexanes yields a precipitate, which is quickly rinsed with Et2O-hexanes to afford pure acetic acid 7-benzyloxy-6-nitro-1,2,3,4-tetrahydro-naphthalen-2-yl ester: 1H NMR (CDCl3) δ 7.66 (s, 1H), 7.48-7.29 (m, 5H), 6.80 (s, 1H), 5.22-5.15 (m, 1H), 5.19 (s, 2H), 3.10 (dd, J=16.0, 8.0 Hz, 1H), 2.95-2.72 (m, 3H), 2.05 (s, 3H), 2.05-1.95 (m, 2H).

후처리

  1. custompartitioned between EtOAc and aq. KOH
  2. dry with materialThe organic layer is dried over MgSO4
  3. concentrationconcentrated
  4. customchromatographed

출처 및 근거

ORD 기록
ord-10a7cfaa50044216a5f6aa06487b5c1a
출처 데이터셋
uspto-grants-2010_04
특허 번호
US07700633B2

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