反应详情

Thionyl chloride (1.65 ml, 22.7 mmol) was added to neat 1-acetoxymethylcyclobutanecarboxylic acid (3.3 g, 18.9 mmol). The resulting mixture was stirred at room temperature for 1 hour, then heated on a steam bath for 5 minutes. After cooling, the excess thionyl chloride, HCl and SO2 were removed under reduced pressure (water aspirator). The remained residue was purified by distillation to provide the desired product as a colorless oil: bp 51°-3° C. (0.02 mm); NMR (CDCl3) δ=1.8~2.7 (9H, m containing a singlet at 2.04 δ), 4.40 (2H, s).

1. temperatureheated on a steam bath for 5 minutes
2. temperatureAfter cooling
3. customthe excess thionyl chloride, HCl and SO2 were removed under reduced pressure (water aspirator)
4. distillationThe remained residue was purified by distillation