Methods for preparing Halohydrins and methods for preparing Epoxides
申请人:Ramachandran P. V.
公开号:US20070282137A1
公开(公告)日:2007-12-06
The invention includes methods for preparing halohydrins and epoxides. A method of preparing halohydrins can include exposing (R
1
CHXCH
2
O—)
2
SO
2
to R
2
COOH to produce R
1
CHXCH
2
COOR
2
and hydrolyzing the R
1
CHXCH
2
COOR
2
to produce the halohydrin R
1
CHXCH
2
OH. R
1
and R
2
can be the same or different single elements and/or organic groups and X can be a halogen. A method of preparing an epoxide can include combining a sulfuric acid containing solution with a halogen to produce a first mixture and exposing the first mixture to trifluoropropene to produce a second mixture. The second mixture can be combined with acetic acid to produce an acetyl halohydrin of trifluoropropene and the acetyl halohydrin can be hydrolyzed to form a halohydrin of trifluoropropene. The halohydrin can be converted to a trifluoropropyl epoxide.
Knunjanz et al., Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1956, p. 843,848;engl.Ausg.S.863,868
作者:Knunjanz et al.
DOI:——
日期:——
——
作者:S. A. Lermontov、N. V. Kuryleva、T. N. Velikokhat"ko
DOI:10.1023/a:1015541225993
日期:——
The reaction of 3,3,3-trifluoropropene with N-bromosuccinimide in acetic acid at 65-70 degreesC affords 3-acetoxy-2-bromo-1,1,1-trifluoropropane. When treated with an alkali, the latter is readily converted into (trifluoromethyl)oxirane.