Diethyl (cyanomethyl)phosphonate → 3-(3,4-Dimethoxy-phenyl)-3-(4-methoxy-phenyl)-acrylonitrile

HRID 971018노트

반응식

HRID 971018 반응식
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]([C:13]2[CH:18]=[CH:17][C:16]([O:19][CH3:20])=[CH:15][CH:14]=2)=O)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].C(OP([CH2:29][C:30]#[N:31])(=O)OCC)C.C[Si]([N-][Si](C)(C)C)(C)C.[Li+].COC1C=C(C(C2C=CC=C(OC)C=2)=CC#N)C=C(OC)C=1>C1COCC1>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]([C:13]2[CH:18]=[CH:17][C:16]([O:19][CH3:20])=[CH:15][CH:14]=2)=[CH:29][C:30]#[N:31])[CH:6]=[CH:7][C:8]=1[O:9][CH3:10]

참가 물질

6

반응물 4

HCID 75676Diethyl (cyanomethyl)phosphonateHCID 2733832Lithium HexamethyldisilazideHCID 2754574(3,4-Dimethoxyphenyl)(4-methoxyphenyl)methanoneHCID 692052993-(3,5-Dimethoxy-phenyl)-3-(3-methoxy-phenyl)-acrylonitrile

생성물 1

HCID 692026013-(3,4-Dimethoxy-phenyl)-3-(4-methoxy-phenyl)-acrylonitrile수율 96%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

(3,4-dimethoxyphenyl)-(4-methoxyphenyl)methanone (2.00 g, 7.35 mmol), cyanomethylphosphonic acid diethyl ester (2.31 ml, 14.69 mmol) in anhydrous THF (10 ml), and lithium bis(trimethylsilyl)amide (1.0 M solution in THF, 14.69 ml, 14.69 mmol) were treated in the same manner as described above for the synthesis of 3-(3,5-dimethoxy-phenyl)-3-(3-methoxy-phenyl)-acrylonitrile. The crude was purified via flash column chromatography (5% EtOAc in hexane gradient to 30% EtOAc in hexane in about 40 min.) to give 3-(3,4-dimethoxy-phenyl)-3-(4-methoxy-phenyl)-acrylonitrile as a pink oil (2.08 g, 96%): 1HNMR (DMSO-d6) δ 7.34-6.7 (m, 7H, Ar), 6.14 (s, 0.50H, double bond proton of one isomer), 6.08 (s, 0.45H, double bond proton of the other isomer), 3.83-3.73 (multiple singlets, 9H, 3OCH3); 13C NMR(CDCl3)δ 162.6, 162.5, 161.6, 161.2, 151.2, 150.7, 149.0, 148.8, 132.2, 131.7, 131.5, 130.3, 129.8, 129.5, 123.2, 122.3, 118.8, 118.8, 114.1, 114.0, 112.9, 111.5, 110.9, 91.9, 91.8, 56.2, 56.1, 56.1, 55.5, 55.5; Anal. Calcd. For C18H17NO3: C, 71.92; H, 6.19; N, 4.32 (+0.04H2O). Found: C, 71.95; H, 6.04; N, 4.54.

후처리

  1. customThe crude was purified via flash column chromatography (5% EtOAc in hexane gradient to 30% EtOAc in hexane in about 40 min.)

출처 및 근거

ORD 기록
ord-acea74eee7024a84924725a3fd3dcf59
출처 데이터셋
uspto-grants-2007_12
특허 번호
US07312241B2

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