摘要
本文提出以稀土氯化物作催化剂,催化等摩尔比的丙烯醛和乙烯基丁醚进行环加成反应,生成2-丁氧基-3,4-二氢-2H-吡喃。实验表明,环加成产物是不稳定的中间物,它可以进一步开环聚合构成一个催化的连串反应。找到了稳定中间物的反应条件,以90—95%产率得到环加成产物。
Rare earth chlorides were used to catalyze the synthesis of 2-butoxy-3, 4-dihydro-2H-pyran using equimolar acrolein and vinyl butyl ether. The cycloadduct is unstable which undergoes catalytic ring op ening oligomerization. The way to stabilize the cyclo adduct has been studied, thus high yields of 90—95% were obtained.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第11期1136-1140,共5页
Acta Chimica Sinica
基金
中国科学院科学基金