Piperidine → Benzoic Acid

HRID 468694노트

반응식

HRID 468694 반응식
N1CCCCC1.FC(F)OC1C(OC)=CC(C=O)=CC=1OC.C(CC(N[C:30]1[CH:38]=[CH:37][CH:36]=[CH:35][C:31]=1[C:32]([OH:34])=[O:33])=O)(O)=O>C1(C)C=CC=CC=1>[C:32]([OH:34])(=[O:33])[C:31]1[CH:35]=[CH:36][CH:37]=[CH:38][CH:30]=1

참가 물질

5

반응물 3

HCID 8082PiperidineHCID 4399222-(2-Carboxyacetamido)benzoic acidHCID 7105984-(Difluoromethoxy)-3,5-dimethoxybenzaldehyde

생성물 1

HCID 243Benzoic Acid수율 163.8%

시약·촉매·용매 1

HCID 1140Toluene용매

실험 절차

Piperidine (110 μL, 1.10 mmol) was added to a suspension of 4-(difluoromethoxy)-3,5-dimethoxybenzaldehyde (200 mg, 1.10 mmol) and 2-[(carboxyacetyl)amino]benzoic acid (233 mg, 1.05 mmol) in toluene (5.0 mL). The reaction flask was fitted with a Dean-Stark apparatus and heated to reflux for 30 min. The reaction was then cooled to rt and the resulting suspension was filtered and washed with toluene. The piperidinium salt was dissolved in MeOH (4 mL) and water (2 mL) and the solution was acidified with 20% aqueous AcOH. The crude product was collected by filtration and recrystallised from EtOH/water and filtered to afford (E)-2-[[4-(difluoromethoxy)-3,5-dimethoxyphenyl)-1-oxo-2-propenyl]amino]benzoic acid (210 mg, 51%) as a pale yellow crystalline solid; mp 211-215° C.; δH (400 MHz, DMSO-d6) 3.87 (s, 6H, OCH3), 6.87 (t, J=75 Hz, 1H, OCHF2), 6.98 (d, J=15.6 Hz, 1H, CH═CHCO), 7.17 (s, 2H, H2′, H6′), 7.18 (t, J4,5=J5,6=8.0 Hz, 1H, H5), 7.61 (d, J=15.6 Hz, 1H, CH═CHCO), 7.62 (t, J3,4=J4,5=8.0 Hz, 1H, H4), 8.00 (d, J5,6=8.0 Hz, 1H, H6), 8.61 (d, J3,4=8.0 Hz, 1H, H3), 11.33 (s, 1H, NH), 13.60 (s, 1H, CO2H); δC (100 MHz, DMSO-d6) 56.4, 105.5, 116.8 117.2 (t, J=259 Hz), 120.4, 122.9, 123.1, 129.6, 131.1, 132.9, 134.0, 140.8, 141.1, 152.6, 163.7, 169.4; νmax 1153, 1113, 1224, 1506, 1593, 1694, 2602, 2946 cm−1.

후처리

  1. customThe reaction flask was fitted with a Dean-Stark apparatus
  2. temperatureheated
  3. temperatureto reflux for 30 min
  4. filtrationthe resulting suspension was filtered
  5. washwashed with toluene
  6. dissolutionThe piperidinium salt was dissolved in MeOH (4 mL)
  7. filtrationThe crude product was collected by filtration
  8. customrecrystallised from EtOH/water
  9. filtrationfiltered

출처 및 근거

ORD 기록
ord-8046a0cd47c04c2cada7212502fd3dff
출처 데이터셋
uspto-grants-2014_01
특허 번호
US08624056B2

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