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Potassium Carbonate → Ethyl 2-(6-(5-cyano-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate

HRID 1798317
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인쇄 미리보기

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HRID 1798317 반응식
[OH:1][B:2]1[C:6]2[CH:7]=[C:8]([OH:12])[CH:9]=[C:10]([CH3:11])[C:5]=2[CH:4]([CH2:13][C:14]([O:16][CH2:17][CH3:18])=[O:15])[O:3]1.Br[C:20]1[S:24][C:23]([C:25]#[N:26])=[N:22][N:21]=1.C(=O)([O-])[O-].[K+].[K+]>C(#N)C>[C:25]([C:23]1[S:24][C:20]([O:12][C:8]2[CH:9]=[C:10]([CH3:11])[C:5]3[CH:4]([CH2:13][C:14]([O:16][CH2:17][CH3:18])=[O:15])[O:3][B:2]([OH:1])[C:6]=3[CH:7]=2)=[N:21][N:22]=1)#[N:26]
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5

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HCID 11430Potassium CarbonateHCID 533885265-Bromo-1,3,4-thiadiazole-2-carbonitrileHCID 58292549Ethyl 2-(1,6-dihydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate

생성물 1

HCID 67252448Ethyl 2-(6-(5-cyano-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate수율 84%

시약·촉매·용매 1

HCID 6342
Acetonitrile
용매

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온도
60 °C

실험 절차

To a mixture of ethyl 2-(1,6-dihydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetate (1.35 g, 5.4 mmol, 1 eq.) and 5-bromo-1,3,4-thiadiazole-2-carbonitrile (1.54 g, 8.1 mmol, 1.5 eq.) in 50 ml ACN was added potassium carbonate (2.24 g, 16.2 mmol, 3 eq.). The reaction was heated at 60° C. for three hours. The reaction was quenched by water, acidified to pH=3 with 1N HCl and then extracted with EtOAc, washed with brine, dried over Na2SO4, and concentrated under reduced pressure. The crude was purified by column chromatography to give desired product as yellow oil (1.63 g, yield 84%). MS (ESI) m/z=718 [2M+H]+.

후처리

  1. customThe reaction was quenched by water
  2. extractionextracted with EtOAc
  3. washwashed with brine
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated under reduced pressure
  6. customThe crude was purified by column chromatography

출처 및 근거

ORD 기록
ord-8a7c5c35f70246e6974ef621e0cb0d5a
출처 데이터셋
uspto-grants-2013_01
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08343944B2

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