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Methyl Acrylate → (E)-3-{1'-tert-butoxycarbonyl-3,4-dihydro-4-oxo-spiro[2H-(1,3)-benzoxazine-2,4'-piperidin]-6-yl}-acrylic acid methyl ester

HRID 518160
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HRID 518160 반응식
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11]2([NH:18][C:17](=[O:19])[C:16]3[CH:20]=[C:21](Br)[CH:22]=[CH:23][C:15]=3[O:14]2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:25]([O:29][CH3:30])(=[O:28])[CH:26]=[CH2:27]>CN(C=O)C.CC([O-])=O.CC([O-])=O.[Pd+2].C1(C)C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>[CH3:30][O:29][C:25](=[O:28])/[CH:26]=[CH:27]/[C:21]1[CH:22]=[CH:23][C:15]2[O:14][C:11]3([CH2:12][CH2:13][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])[CH2:9][CH2:10]3)[NH:18][C:17](=[O:19])[C:16]=2[CH:20]=1
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참가 물질

6

반응물 2

HCID 7294Methyl AcrylateHCID 2794762tert-Butyl 6-bromo-4-oxo-3,4-dihydro-1'H-spiro[1,3-benzoxazine-2,4'-piperidine]-1'-carboxylate

생성물 1

HCID 66932321(E)-3-{1'-tert-butoxycarbonyl-3,4-dihydro-4-oxo-spiro[2H-(1,3)-benzoxazine-2,4'-piperidin]-6-yl}-acrylic acid methyl ester수율 99.6%

시약·촉매·용매 3

HCID 80271Tri-o-tolylphosphine촉매2회
HCID 167845
palladium(II) acetate
촉매
2회
HCID 6228Dimethylformamide용매

실험 절차

6-Bromo-3,4-dihydro-4-oxo-spiro[2H-(1,3)-benzoxazine-2,4′-piperidin]-1′-carboxylic acid tert-butyl ester (5.00 g, 12.6 mmol) was dissolved in hot DMF (15 ml) and then TEA (5.26 ml, 37.8 mmol), tris(o-tolyl)phosphine (153 mg, 0.504 mmol), Pd(OAc)2 (56 mg, 0.25 mmol) and methyl acrylate (3.25 g, 37.8 mmol) were added at RT. The mixture was heated at 100° C. for 6 h under N2 with a further addition of tris(o-tolyl)phosphine (153 mg, 0.504 mmol) and Pd(OAc)2 (56 mg, 0.25 mmol) after three hours) and then partitioned between brine and AcOEt. The organic phase was rinsed with water and brine, dried over Na2SO4 and evaporated. The residue was triturated in AcOEt and petroleum ether to give (E)-3-{1′-tert-butoxycarbonyl-3,4-dihydro-4-oxo-spiro[2H-(1,3)-benzoxazine-2,4′-piperidin]-6-yl}-acrylic acid methyl ester (5.05 g)

후처리

  1. customthen partitioned between brine and AcOEt
  2. washThe organic phase was rinsed with water and brine
  3. dry with materialdried over Na2SO4
  4. customevaporated
  5. customThe residue was triturated in AcOEt

출처 및 근거

ORD 기록
ord-be0584b2d179450a844797cf5d2b0314
출처 데이터셋
uspto-grants-2015_08
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US09115148B2

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