Tin tetrachloride → (1R,10R,11S,16S)-5-methoxy-1,11,15,15-tetramethyl-8-thiatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene

HRID 422155ノート

反応式

HRID 422155 の反応式
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([S:9][CH2:10][C@@H:11]2[C@:20]3([CH3:21])[C@H:15]([C:16]([CH3:23])([CH3:22])[CH2:17][CH2:18][CH2:19]3)[CH2:14][CH2:13][C@@:12]2([CH3:25])O)[CH:6]=[CH:7][CH:8]=1.Cl[Sn](Cl)(Cl)Cl>C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:6]([C@@:12]3([CH3:25])[C@H:11]([CH2:10][S:9]2)[C@:20]2([CH3:21])[C@H:15]([C:16]([CH3:23])([CH3:22])[CH2:17][CH2:18][CH2:19]2)[CH2:14][CH2:13]3)=[CH:7][CH:8]=1

参加物

4

反応物 2

HCID 24287Tin tetrachlorideHCID 58294805(1R,2R,4aS,8aS)-1-{[(3-methoxyphenyl)sulfanyl]methyl}-2,5,5,8a-tetramethyl-decahydronaphthalen-2-ol

生成物 1

HCID 53240551(1R,10R,11S,16S)-5-methoxy-1,11,15,15-tetramethyl-8-thiatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene収率 46.3%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

反応条件

温度
-78 °C

実験手順

To a solution of (1R,2R,4aS,8aS)-1-{[(3-methoxyphenyl)sulfanyl]methyl}-2,5,5,8a-tetramethyl-decahydronaphthalen-2-ol (12b) (2.5 g, 6.9 mmol) in CH2Cl2 (70 mL), cooled to −78° C., a solution of SnCl4 (3.22 mL, 27.6 mmol) in CH2Cl2 (30 mL) was added dropwise. The mixture was stirred at −78° C. for 4 h. The reaction was quenched with water (100 mL), and the organic layer was separated, dried (Na2SO4), and concentrated. Purification by column chromatography on silica gel (Hexanes/toluene, 2:1) gave (1R,10R,11S,16S)-5-methoxy-1,11,15,15-tetramethyl-8-thiatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene (Compound No. 51) (1.10 g, 46%) as a white solid. 1H NMR (CDCl3): δ 7.19 (d, 1H), 6.58 (m, 2H), 3.72 (s, 3H), 2.95 (q, 2H), 2.40 (m, 1H), 1.84-1.35 (m, 9H), 1.20 (s, 3H), 1.18-0.99 (m, 2H), 0.95 (s, 3H), 0.85 (s, 3H), 0.82 (s, 3H). (1R,10R,11S,16S)-3-Methoxy-1,11,15,15-tetramethyl-8-thiatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene (Compound No. 52) (0.44 g, 19%) was also isolated as a white solid. 1H NMR (CDCl3): δ 6.96 (t, 1H), 6.67 (d, 1H), 6.56 (d, 1H), 3.78 (s, 3H), 3.32 (m, 1H), 2.82 (q, 2H), 1.82-1.40 (m, 7H), 1.38 (s, 3H), 1.35-0.98 (m, 3H), 0.92 (s, 3H), 0.95 (m, 1H), 0.87 (s, 3H), 0.83 (s, 3H).

後処理

  1. customThe reaction was quenched with water (100 mL)
  2. customthe organic layer was separated
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated
  5. customPurification by column chromatography on silica gel (Hexanes/toluene, 2:1)

出典と根拠

ORDレコード
ord-11288067561d4f0aa5dc5748234ae8de
出典データセット
uspto-grants-2012_01
特許番号
US08101605B2

反応ノート

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