Sodium periodate → Methyl 5-bromo-1-(2,2-dihydroxyethyl)-4-oxo-3-[(phenylmethyl)oxy]-1,4-dihydro-2-pyridinecarboxylate

HRID 594836노트

반응식

HRID 594836 반응식
I([O-])(=O)(=O)=[O:2].[Na+].[Br:7][C:8]1[C:9](=[O:31])[C:10]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)=[C:11]([C:19]([O:21][CH3:22])=[O:20])[N:12]([CH2:14][CH:15]([OH:18])CO)[CH:13]=1>O>[Br:7][C:8]1[C:9](=[O:31])[C:10]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)=[C:11]([C:19]([O:21][CH3:22])=[O:20])[N:12]([CH2:14][CH:15]([OH:2])[OH:18])[CH:13]=1

참가 물질

4

반응물 2

HCID 23667635Sodium periodateHCID 58277229Methyl 5-bromo-1-(2,3-dihydroxypropyl)-4-oxo-3-[(phenylmethyl)oxy]-1,4-dihydro-2-pyridinecarboxylate

생성물 1

HCID 58277223Methyl 5-bromo-1-(2,2-dihydroxyethyl)-4-oxo-3-[(phenylmethyl)oxy]-1,4-dihydro-2-pyridinecarboxylate수율 88%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

A reactor was charged with sodium periodate (1.67 kg, 7.8 mol) and 44 L of deionized water. To the agitated mixture was added 8.5 kg of ice. This was stirred until all the ice melted and the mixture temperature was 1.4° C. To this was added methyl 5-bromo-1-(2,3-dihydroxypropyl)-4-oxo-3-[(phenylmethyl)oxy]-1,4-dihydro-2-pyridinecarboxylate 19 (2.73 kg, 6.62 mol) via a powder addition funnel. The mixture was allowed to warm to rt and the slurry was stirred for 16 h. A sample was monitored by 1H NMR and showed the disappearance of starting material. The mixture was filtered and the cake washed with 20 kg of deionized water. This was repeated until a negative starch/iodide paper result was obtained (4×20 L washes). The solids were dried in a vacuum oven at 45-55° C. to provide methyl 5-bromo-1-(2,2-dihydroxyethyl)-4-oxo-3-[(phenylmethyl)oxy]-1,4-dihydro-2-pyridinecarboxylate 20 (2.176 kg, 88%) as a mixture with the corresponding aldehyde form 21. Purity was determined to be 99.5% by HPLC. 1H NMR (300 MHz, acetone-d6) δ 8.12 (s, 1H), 7.49-7.30°(m, 5H), 5.56 (dd, J=6.0, 2.4 Hz, 1H), 5.23 (m, 1H), 5.20 (s, 2H), 3.97 (d, J=5.1 Hz, 2H), 3.87 (s, 3H).

후처리

  1. customwas 1.4° C
  2. additionvia a powder addition funnel
  3. filtrationThe mixture was filtered
  4. washthe cake washed with 20 kg of deionized water
  5. customresult
  6. customwas obtained (4×20 L washes)
  7. customThe solids were dried in a vacuum oven at 45-55° C.

출처 및 근거

ORD 기록
ord-5ea93796d23f44928d7387af4a304076
출처 데이터셋
uspto-grants-2016_01
특허 번호
US09242986B2

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