Benzenesulfinic acid → (2RS,6S)-6-benzenesulfonyl-2-(4-fluorophenoxymethyl)-tetrahydropyran

HRID 381632ノート

反応式

HRID 381632 の反応式
[C:1]1([S:7]([OH:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[Cl-].[Ca+2].[Cl-].[F:13][C:14]1[CH:29]=[CH:28][C:17]([O:18][CH2:19][C@H:20]2[O:25][CH:24](OC)[CH2:23][CH2:22][CH2:21]2)=[CH:16][CH:15]=1>C(Cl)Cl>[C:1]1([S:7]([C@@H:24]2[O:25][CH:20]([CH2:19][O:18][C:17]3[CH:16]=[CH:15][C:14]([F:13])=[CH:29][CH:28]=3)[CH2:21][CH2:22][CH2:23]2)(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

参加物

5

反応物 3

HCID 12057Benzenesulfinic acidHCID 5284359Calcium ChlorideHCID 20588441(2RS,6S)-6-(4-fluorophenoxymethyl)-2-methoxytetrahydropyran

生成物 1

HCID 20588442(2RS,6S)-6-benzenesulfonyl-2-(4-fluorophenoxymethyl)-tetrahydropyran収率 70%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

実験手順

25% HCl was added dropwise to benzenesulfinic acid sodium salt (2.0 g), till the solid dissolved. This mixture was extracted with ethyl acetate (30 ml), dried (Na2SO4) and concentrated to give benzenesulfinic acid (1.5 g). To an ice-cooled mixture of benzenesulfinic acid (1.48 g, 10.5 mmol) and calcium chloride (1.15 g, 10.5 mmol) in dry CH2Cl2 a solution of (2RS, 6S)-6-(4-fluorophenoxymethyl)-2-methoxytetrahydropyran (0.5 g, 2.1 mmol) in dry CH2Cl2 (5 ml) was added. The reaction mixture was stirred for 4 h, filtered through celite and washed with CH2Cl2. The combined organic layer was washed with saturated aqueous Na2CO3, water, brine and dried (Na2SO4). The solvent was removed under vacuum and the residue was purified on a silica gel column using light petroleum-ethyl acetate (4:1) as eluent to afford pure (2RS, 6S)-6-benzenesulfonyl-2-(4-fluorophenoxymethyl)-tetrahydropyran (0.5 g, 70%) as a viscous liquid. TLC:ethyl acetate-light petroleum (1:3), Rf=0.4. 1H NMR (CDCl3, 200 MHz): δ 1.5 (m, 2H), 1.75-2.0 (m, 2H), 2.2-2.4 (m, 1H), 2.6-2.8 (m, 1H), 3.75-3.9 (m, 2H), 4.65 (d, 1H), 4.85-5.0 (m, 1H), 6.7-7.0 (m, 4H), 7.5-7.7 (m, 3H), 7.95 (d, J=5.4 Hz, 2H).

後処理

  1. additionwas added
  2. filtrationfiltered through celite
  3. washwashed with CH2Cl2
  4. washThe combined organic layer was washed with saturated aqueous Na2CO3, water, brine
  5. dry with materialdried (Na2SO4)
  6. customThe solvent was removed under vacuum
  7. customthe residue was purified on a silica gel column

出典と根拠

ORDレコード
ord-4dd2685c7ba24a9ea950dabb675cd471
出典データセット
uspto-grants-2001_10
特許番号
US06306895B1

反応ノート

読み込み中…