1: diethyl ether / 0 °C 2: thermal or acidocatalyzed dehydration 3: LDA / tetrahydrofuran / -78 °C 4: tetrahydrofuran / -78 deg C to 20 deg C View Scheme
参考文献
Gesson, J.P.; Jacquesy, J.C.; Renoux, B.
Tetrahedron Letters, 1983 , vol. 24, # 27 p. 2757 - 2760