Dimethyl Sulfoxide → HCID 118207506、化合物

HRID 1507246ノート

反応式

HRID 1507246 の反応式
CS(C)=O.C(Cl)(=O)C(Cl)=O.[CH2:11]([O:18][C:19]1[CH:24]=[CH:23][C:22]([C@@H:25]2[CH2:30][CH2:29][N:28]([C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:27][C@H:26]2[OH:38])=[CH:21][CH:20]=1)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.C(N(CC)CC)C>C(Cl)Cl>[CH2:11]([O:18][C:19]1[CH:24]=[CH:23][C:22]([CH:25]2[CH2:30][CH2:29][N:28]([C:31]([O:33][C:34]([CH3:36])([CH3:35])[CH3:37])=[O:32])[CH2:27][C:26]2=[O:38])=[CH:21][CH:20]=1)[C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=1

参加物

6

反応物 4

HCID 679Dimethyl SulfoxideHCID 8471TriethylamineHCID 65578Oxalyl chlorideHCID 97107398HCID 97107398、化合物

生成物 1

HCID 118207506HCID 118207506、化合物収率 72.5%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

実験手順

To a solution of DMSO (3.7 mL, 52 mmol) in 50 mL of DCM under nitrogen at −78° C. was added oxalyl chloride (4.45 mL, 51 mmol). The mixture was stirred for 10 minutes after the completion of the addition. Then a solution of (±)-rel-(3S,4S)-tert-butyl 4-(4-(benzyloxy)phenyl)-3-hydroxypiperidine-1-carboxylate (from Example 50, step D, 6.5 g, 17 mmol) in 50 mL of DCM was added and the mixture was stirred in the cold for a further 90 minutes. The reaction was then quenched by the addition of 11.8 mL of triethylamine (85 mmol) and allowed to warm up to rt. The mixture was then partitioned between 200 mL brine and 200 mL DCM. The layers were separated, and the organic layer was dried over Na2SO4, filtered, and concentrated. The residue was subjected to column chromatography on 48 g of basic alumina eluting with 8% ethyl acetate/hexanes to afford 4.7 g (67%) of racemic tert-butyl 4-(4-(benzyloxy)phenyl)-3-oxopiperidine-1-carboxylate. LCMS (method F) RT 2.376 min, m/z 381.2 (M+); chiral SFC (method G) RT 4.54 min (46.9% AP, 4.93 min (49.7% AP). 1H NMR (400 MHz, DMSO-d6) δ 7.30-7.40 (m, 5H), 7.07 (d, J=7 Hz, 2H) 6.94 (d, J=7), 2H; 5.08 (s, 2H), 4.10 (d, J=17.6, 1H), 3.97 (d, J=17.6, 1H), 3.77 (m, 2H), 3.43 (br s, 1H), 2.16 (m, 2H), 1.42 (s, 9H).

後処理

  1. additionafter the completion of the addition
  2. stirringthe mixture was stirred in the cold for a further 90 minutes
  3. customThe mixture was then partitioned between 200 mL brine and 200 mL DCM
  4. customThe layers were separated
  5. dry with materialthe organic layer was dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated

出典と根拠

ORDレコード
ord-81c7c9d483d049658174b155635db8d8
出典データセット
uspto-grants-2015_12
特許番号
US09221796B2

反応ノート

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