Ethyl Acetate → HCID 66828188、化合物

反応式

CC(C)([O-])C.[K+].[C:7]1([C:13]2([CH2:19][CH:20]=O)[CH2:18][CH2:17][CH2:16][CH2:15][CH2:14]2)[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1.[CH3:22][CH2:23][O:24][C:25]([CH3:27])=[O:26]>C1COCC1>[C:7]1([C:13]2([CH2:19]/[CH:20]=[CH:27]/[C:25]([O:24][CH2:23][CH3:22])=[O:26])[CH2:14][CH2:15][CH2:16][CH2:17][CH2:18]2)[CH:8]=[CH:9][CH:10]=[CH:11][CH:12]=1

参加物

実験手順

To a solution of triethyl phosphonoacetate (0.601 mL, 3.00 mmol) in THF (10 mL) at 0° C. was added 1 M potassium tert-butoxide (3.00 mL, 3.00 mmol) in THF dropwise and the mixture was stirred for 30 mins at the same temp. Then a solution of 2-(1-phenylcyclohexyl)acetaldehyde (405 mg, 2.0 mmol) in 4 ml of THF was added dropwise and the mixture was stirred for 0.5 hrs at 0° C. and for 1.5 hrs at room temp. It was added to EtOAc and washed with water (2×) and saturated NH4Cl. It was dried over Na2SO4 and evaporated to give an oily residue. It was purified by Combiflash (80 g silica gel) eluting with 5:95 EtOAc-hexane to give (E)-ethyl 4-(1-phenylcyclohexyl)but-2-enoate (213.7 mg). 1H NMR (400 MHz, CCl3D) δ ppm 7.27-7.37 (4H, m), 7.15-7.23 (1H, m), 6.60 (1H, ddd, J=15.49, 7.91, 7.80 Hz), 5.66 (1H, dt, J=15.60, 1.32 Hz), 4.12 (2H, q, J=7.18 Hz), 2.39 (2H, dd, J=7.80, 1.21 Hz), 2.11 (2H, dd, J=13.07, 5.60 Hz), 1.33-1.66 (8H, m), 1.24 (3H, t, J=7.18 Hz).