[C:1]([OH:6])(=[O:5])/[CH:2]=[CH:3]/[CH3:4].[CH3:7][Si:8]([CH3:11])([CH3:10])Cl.N1C=CC=CC=1>C(OCC)C>[C:1]([O:6][Si:8]([CH3:11])([CH3:10])[CH3:7])(=[O:5])/[CH:2]=[CH:3]/[CH3:4]To a single-neck reaction flask (250 mL) were added of crotonic acid (10.750 g, 0.125 mol), anhydrous ethyl ether (125 mL) and trimethyl chlorosilane (19 mL, 0.150 mol). The mixture was stirred for 5 min. Pyridine (12 mL, 0.150 mol) was dropwise added into the resulting mixture under stirring at the temperature of 35° C. After the addition finished, the mixture was warmed up to the temperature of 38° C. and stirred under relux for 3 hr. The white solid was filtered in vacuo. Ethyl ether was evaporated under atmospheric pressure. The resultant was distilled under reduced pressure to collect the fraction under 10 mmHg at the temperature of 46° C.-48° C. to give (E)-trimethylsilyl 2-butenoate as a colorless liquid (12.242 g). Yield: 62.0%.
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