Ichikawa, Junji published the artcileHeck-type 5-endo–trig cyclizations promoted by vinylic fluorines: Ring-fluorinated indene and 3H-pyrrole syntheses from 1,1-difluoro 1-alkenes, Synthetic Route of 866-23-9, the publication is Journal of Fluorine Chemistry (2006), 127(4-5), 489-504, database is CAplus.
Arylpalladium or aminopalladium species bearing a 2,2-difluorovinyl group undergo an unusual 5-endo alkene insertion followed by β-fluorine elimination. These processes provide a facile access to ring-fluorinated 5-membered carbocyclic and heterocyclic compounds starting from an 2-(3,3-difluoroallyl)phenyl trifluoromethanesulfonate and 3,3-difluoroallyl ketone O-pentafluorobenzoyl oximes. In both systems, the two vinylic F atoms are essential for Heck-type 5-endo–trig cyclizations. The crystal structure of F2C:CHCMe2CPh:NOH is presented [monoclinic, space group P21/c, a 7.5652(18), b 6.3060(15), c 23.707(6) Å, V 1121.4(5) Å3, Z 4].
Journal of Fluorine Chemistry published new progress about 866-23-9. 866-23-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyltrichloromethylphosphonate, and the molecular formula is C5H10Cl3O3P, Synthetic Route of 866-23-9.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics