[EN] HIGH SELECTIVITY PROCESS TO MAKE DIHYDROFLUOROALKENES<br/>[FR] PROCÉDÉ À SÉLECTIVITÉ ÉLEVÉE POUR PRÉPARER DES DIHYDROFLUORALCÈNES
申请人:DU PONT
公开号:WO2009142642A1
公开(公告)日:2009-11-26
Disclosed is a method for the synthesis of fluorinated alkenes comprising contacting a fluorinated alkyne of the formula R1 C≡C R2, wherein R1 and R2 are independently selected from CF3, C2F5, C3F7, and C4F9, in a pressure vessel, with a Lindlar catalyst, with substantially one molar equivalent of hydrogen, to make the corresponding cis-alkene of formula R1 C≡C R2 with high selectivity, wherein said hydrogen is added in portions over a period of time, so as to produce an initial pressure in the pressure in the vessel of no more than about 100 psi.
HIGH SELECTIVITY PROCESS TO MAKE DIHYDROFLUOROALKENES
申请人:SWEARINGEN Ekaterina N.
公开号:US20080269532A1
公开(公告)日:2008-10-30
Disclosed is a method for the synthesis of fluorinated alkenes comprising contacting a fluorinated alkyne of the formula R
1
C≡C R
2
, wherein R
1
and R
2
are independently selected from CF
3
, C
2
F
5
, C
3
F
7
, and C
4
F
9
, in a pressure vessel, with a Lindlar catalyst, with substantially one molar equivalent of hydrogen, to make the corresponding cis-alkene of formula R
1
C≡C R
2
with high selectivity, wherein said hydrogen is added in portions over a period of time, so as to produce an initial pressure in the pressure in the vessel of no more than about 100 psi.