Bis(2-pyridyl) ketone → 2-Heptenoic acid

HRID 378742

反応式

HRID 378742 の反応式
N1C=C[CH:4]=[CH:3][C:2]=1[C:7]([C:9]1C=CC=CN=1)=O.CO.[CH3:17][C:18]([OH:20])=[O:19].C(Cl)Cl>>[C:18]([OH:20])(=[O:19])/[CH:17]=[CH:4]/[CH2:3][CH2:2][CH2:7][CH3:9]

参加物

3

反応物 2

HCID 88065Bis(2-pyridyl) ketoneHCID 21877243DCM MeOH AcOH

生成物 1

HCID 52827092-Heptenoic acid収率 78%

実験手順

Prepared as above from 337.8 mg (0.86 mmol) of the pyridyl ketone and 742 mg (1.63 mmol) of the Wittig salt. Flash chromatography with MeOH-AcOH-CH2Cl2 (3:2:95) gave in ~92% yield a mixture of Wittig product (E/Z=~7.7:1) from which 326.5 mg (78%) of (E)-heptenoic acid was isolated cleanly: mp 61-64° C.; 1H NMR (CDCl3) δ8.57 (d, J=1.7 Hz, 1H), 8.47 (d, J=4.1 Hz, 1H), 8.28 (s, 1H), 8.05 (d, J=8.2 Hz, 2H), 7.52 (t, J=5.7 Hz, 1H), 7.45 (d, J=8.0 Hz, 1H), 7.25 (m, 5H), 6.94 (d, J=8.2 Hz, 2H), 6.94 (buried, 1H), 6.18 (t, J=7.4 Hz, 1H), 4.15 (t, J=5.0 Hz, 2H), 3.87 (dt, J=5.4, 5.3 Hz, 2H), 2.31 (dd, J=7.1, 6.7 Hz, 2H), 2.19 (ddd, J=7.3, 7.1, 6.9 Hz, 2H), 1.67-1.51 (m, 4H); FDMS 512 (M+1). Anal. (C30H29N3O5) C, H, N.

出典と根拠

ORDレコード
ord-9b60e89105974016b869784b39d2524f
出典データセット
uspto-grants-2000_02
特許番号
US06031095

関連ノート

読み込み中…