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。