Bromoform → (2S,4aS,6aR,7R,9R,10aS,10bR)-9-(Bromo)-2-(3-furanyl)-dodecahydro-6a,10b-dimethyl-4,10-dioxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester

HRID 12322

反応式

HRID 12322 の反応式
[CH3:1][O:2][C:3]([C@@H:5]1[CH2:18][C@H:17](O)[C:16](=[O:20])[C@H:15]2[C@@:6]1([CH3:28])[CH2:7][CH2:8][C@H:9]1[C@:14]2([CH3:21])[CH2:13][C@@H:12]([C:22]2[CH:26]=[CH:25][O:24][CH:23]=2)[O:11][C:10]1=[O:27])=[O:4].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(Br)(Br)[Br:49]>C(Cl)Cl>[CH3:1][O:2][C:3]([C@@H:5]1[CH2:18][C@@H:17]([Br:49])[C:16](=[O:20])[C@H:15]2[C@@:6]1([CH3:28])[CH2:7][CH2:8][C@H:9]1[C@:14]2([CH3:21])[CH2:13][C@@H:12]([C:22]2[CH:26]=[CH:25][O:24][CH:23]=2)[O:11][C:10]1=[O:27])=[O:4]

参加物

5

反応物 3

HCID 5558Bromoform2 回HCID 11776Triphenylphosphine2 回HCID 11395172(2S,4aS,6aR,7R,9S,10aS,10bR)-9-(hydroxy)-2-(3-furanyl)dodecahydro-6a,10b-dimethyl-4,10-dioxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester

生成物 1

HCID 68683634(2S,4aS,6aR,7R,9R,10aS,10bR)-9-(Bromo)-2-(3-furanyl)-dodecahydro-6a,10b-dimethyl-4,10-dioxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester収率 59%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

A mixture of salvinorin B (8a) (0.15 g, 0.38 mmol), triphenylphosphine (0.21 g, 0.80 mmol), and bromoform (0.15 g, 0.45 mmol) in CH2Cl2 (30 mL) was stirred at room temperature overnight. TLC indicated that starting material was still present after 16 h, thus additional triphenylphosphine (0.11 g, 0.42 mmol) and bromoform (0.07 g, 0.21 mmol) were added and the mixture was stirred for an additional 3 h. The solvent was removed under reduced pressure affording a crude solid. The oil was purified by column chromatography (eluent: 30% EtOAc/n-hexanes) to afford 0.10 g (59%) of 36 as a white solid, mp 170-173° C. (EtOAc/n-hexanes); 1H NMR (CDCl3): δ 1.15 (3H, s); 1.48 (3H, s); 1.60 (3H, m); 1.81 (1H, dd, J=2.7, 9.9); 1.95 (1H, dd, J=13.2, 26.1); 2.1 (2H, m); 2.27 (1H, s); 2.47 (1H, dd, J=4.8, 13.2); 2.66 (1H, m); 2.80 (1H, dd, J=3.3, 13.2); 3.70 (3H, s); 3.89 (2H, d, J=2.4); 4.45 (1H, m); 5.55 (1H, dd, J=4.8, 11.7); 6.38 (1H, dd, J=0.9, 1.5); 7.4 (2H, m).

後処理

  1. waitwas still present after 16 h
  2. stirringthe mixture was stirred for an additional 3 h
  3. customThe solvent was removed under reduced pressure
  4. customaffording a crude solid
  5. customThe oil was purified by column chromatography (eluent: 30% EtOAc/n-hexanes)

出典と根拠

ORDレコード
ord-f9487c4143a64edc9e1870c4f003f434
出典データセット
uspto-grants-2010_06
特許番号
US07728001B2

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