作者:Ph. Coutrot、C. Grison、R. Sauvêtre
DOI:10.1016/0022-328x(87)85116-1
日期:1987.9
2-Diethoxyphosphoryl-2-fluoroacetic acid was converted into the lithium α lithiocarboxylate dianion by treatment with n-butyllithium in hexane/tetrahydrofuran at −70°C. The Horner reaction between this new dianion and carbonyl compounds gave various 2-fluoro-2-alkenoic acids. Application of the method to the cis,trans caronaldehyde ethyl esters led to the 2-fluoroethenyl pyrethroid derivatives (Z,cis, E-cis, Z-trans,
通过在-70℃下在己烷/四氢呋喃中用正丁基锂处理,将2-二乙氧基磷酰基-2-氟乙酸转化为α-硫代羧酸锂二价阴离子。这种新的二价阴离子与羰基化合物之间的霍纳反应产生了各种2-氟-2-链烯酸。该方法在顺,反戊醛乙酯上的应用产生了2-氟乙烯基拟除虫菊酯衍生物(Z,顺式,E-顺式,Z-反式,E-反式)。