Trifluoroacetylation of Methylpyridines and Other Methylazines: A Convenient Access to Trifluoroacetonylazines
作者:Masami Kawase、Mutsumi Teshima、Setsuo Saito、Satoru Tani
DOI:10.3987/com-98-8268
日期:——
Treatment of methyl substituted azines, such as pyridine, pyrimidine, quinoline, oxazole, benzoxazole, benzimidazole, and benzothiazole, with trifluoroacetic anhydride in the presence of pyridine at room temperature gave the corresponding trifluoroacetonyl substituted azines in good yields.
Chemoenzymatic Asymmetric Synthesis of Pyridine‐Based α‐Fluorinated Secondary Alcohols
Two for one: A straightforward chemoenzymatic synthesis pathway towards valuable chiral alcohols with α-fluorination in close proximity to the chiral center and a pyridine ring is presented. High conversions with excellent enantioselectivities were found, showing its high synthetic potential.
Highly Enantioselective Transfer Hydrogenation of Fluoroalkyl Ketones
作者:Damjan Šterk、Michel Stephan、Barbara Mohar
DOI:10.1021/ol062358r
日期:2006.12.1
[Structure: see text] The asymmetric transferhydrogenation of fluoroalkyl ketones mediated by [Ru(eta6-arene)((S,S)-R2NSO2DPEN)] catalysts using HCO2H-Et3N afforded the corresponding alcohols with high ee's and in excellent yields.