Water → Ethyl E-2-phosphono-3-[2-(1-tridecynyl)phenyl]propenoate

HRID 1647964ノート

反応式

HRID 1647964 の反応式
C([O:3][P:4]([O:32]CC)(/[C:6](=[CH:12]/[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[C:19]#[C:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH3:31])/[C:7]([O:9][CH2:10][CH3:11])=[O:8])=[O:5])C.Br[Si](C)(C)C.CC(C)=O.CCCCCCC.O>C(Cl)Cl.CC(C)=O>[P:4](/[C:6](=[CH:12]/[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[C:19]#[C:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH3:31])/[C:7]([O:9][CH2:10][CH3:11])=[O:8])([OH:32])([OH:5])=[O:3]

参加物

7

反応物 4

HCID 962Water2 回HCID 76113BromotrimethylsilaneHCID 15284941Ethyl 2-(diethoxyphosphinyl)-3-[2-(1-tridecynyl)phenyl]-2-E-propenoateHCID 21879760Acetone heptane

生成物 1

HCID 67708256Ethyl E-2-phosphono-3-[2-(1-tridecynyl)phenyl]propenoate収率 47.6%

試薬・触媒・溶媒 2

HCID 180Acetone溶媒HCID 6344Dichloromethane溶媒

反応条件

温度
0 °C

実験手順

Ethyl 2-(diethoxyphosphinyl)-3-[2-(1-tridecynyl)phenyl]-2-E-propenoate (0.50 g, 1.02 mmol) prepared according to Example 5 was dissolved in dry CH2Cl2 (3 ml) and CD2Cl2 (2 ml, dried over activated neutral alumina) and cooled to 0° C. Bromotrimethylsilane (0.31 ml, 2.35 mmol) was added over a two to three minute period. The progress of the reaction was monitored by 31P NMR, to follow disappearance of the starting material. After about 5 hours, the solvent was removed under reduced pressure. Acetone-heptane (5.5 ml, 10:1) containing 0.045 ml (2.5 mmol) water was added and the reaction was stirred for 1.5 hours. At the end of this time the solvent was stripped. Since NMR indicated incomplete reaction, acetone (5 ml) containing water (0.05 ml, 2.8 mmol) was added and stirring was continued for two hours. After stripping the solvent, the reaction was still incomplete. It required 2.5 more hours under these conditions to complete the reaction. The solvent was stripped off and the residue was chromatographed on silica eluting with 10% chloroform and 20% methanol in heptane. Fractions containing product were recrystallized from heptane yielding a white solid, 0.211 g, 0.486 mmol, 47.6% yield; mp 68°-69° C.; 1H NMR (CDCl3) ∂ 0.86 (m, 3H), 1.09 to 1.63 (several m, 21H), 2.40 (t, J=7.1 Hz, 2H), 4.19 (q, J=7.1 Hz, 2H), 7.17 to 7.44 (several m, 4H), 8.15 (d, J=24.7 Hz, 1H), 8.81 (br s, 2.7H); FAB mass spectrum m/z 434 (M+H)+.

後処理

  1. customthe solvent was removed under reduced pressure
  2. additionwas added
  3. additionwas added
  4. stirringstirring
  5. waitwas continued for two hours
  6. customthe reaction
  7. customthe residue was chromatographed on silica eluting with 10% chloroform and 20% methanol in heptane
  8. additionFractions containing product
  9. customwere recrystallized from heptane yielding a white solid, 0.211 g, 0.486 mmol, 47.6% yield

出典と根拠

ORDレコード
ord-3d0a235fa1704af4bd3c5e05ea4cf249
出典データセット
uspto-grants-1995_07
特許番号
US05434288

反応ノート

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