Cyclic amidine hydroiodide for the synthesis of cyclic carbonates and cyclic dithiocarbonates from carbon dioxide or carbon disulfide under mild conditions
作者:Naoto Aoyagi、Yoshio Furusho、Takeshi Endo
DOI:10.1016/j.tet.2019.130781
日期:2019.12
Hydroiodides of amidines can catalyze the reaction of carbon dioxide and epoxides under mild conditions such as ordinary pressure and ambient temperature, and the corresponding five-membered cyclic carbonates were obtained in high yields. The reaction of epoxide with carbon disulfide was also examined under the same conditions. Detailed investigation showed that the catalytic activity was highly affected
METHOD FOR PRODUCING (2R)-2-FLUORO-2-C-METHYL-D-RIBONO- -LACTONE PRECURSOR
申请人:Central Glass Company, Limited
公开号:EP2578578A1
公开(公告)日:2013-04-10
In the presence invention, a (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is produced in the form of a ring-opened fluorinated compound by reaction of a 1,2-diol with sulfuryl fluoride (SO2F2) in the presence of an organic base and, optionally, a fluoride ion source. The production method of the present invention secures less number of process steps as compared to the conventional production method (shortening of three steps: cyclic sulfurous esterification, oxidation and ring-opening fluorination to one step) and satisfies the requirements for industrial production (high yield and high reproductivity). The thus-obtained (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is useful as an important intermediate for the synthesis of 2'-deoxy-2'-fluoro-2'-C-methylcytidine with antivirus activity.
Method for Producing (2R)-2-Fluoro-2-C-Methyl-D-Ribono-y-Lactone Precursor
申请人:Ishii Akihiro
公开号:US20130072699A1
公开(公告)日:2013-03-21
In the presence invention, a (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is produced in the form of a ring-opened fluorinated compound by reaction of a 1,2-diol with sulfuryl fluoride (SO
2
F
2
) in the presence of an organic base and, optionally, a fluoride ion source. The production method of the present invention secures less number of process steps as compared to the conventional production method (shortening of three steps: cyclic sulfurous esterification, oxidation and ring-opening fluorination to one step) and satisfies the requirements for industrial production (high yield and high reproductivity). The thus-obtained (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is useful as an important intermediate for the synthesis of 2′-deoxy-2′-fluoro-2′-C-methylcytidine with antivirus activity.