Synthesis of 4,5-dialkyl 5-acetyl-3-oxo-3-(triphenylphosphoranylidene)- tetrahydrofuran-4,5-dicarboxylates
作者:Issa Yavari、Bita Mohtat、Hasan Zare
DOI:10.1070/mc2006v016n02abeh002281
日期:2006.1
Alkyl 2-chloroacetoacetates undergo a complex reaction with dialkyl acetylenedicarboxylates in the presence of triphenylphosphine to produce a nearly 1:1 mixture of the cis/trans isomers of dialkyl 5-acetyl-2-oxo-3-(triphenylphosphoranylidene)tetrahydrofuran- 4,5-dicarboxylates in excellent yields.
2-
氯乙酰乙酸烷基
酯在
三苯基膦的存在下与
乙炔基二
羧酸二烷基
酯进行复杂反应,生成近乎1:1的5-
乙酰基-2-
氧-3-(三
苯基正膦亚基)
四氢呋喃二烷基顺式/反式异构体混合物。 -二
羧酸盐具有优异的产率。