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.
Facile preparation of CF3-substituted carbinols with an azine donor and subsequent kinetic resolution through stereoselective Si–O coupling
作者:Anne Steves、Martin Oestreich
DOI:10.1039/b911534j
日期:——
A number of CF3-substituted carbinols decorated with an azine donor are efficiently prepared from fluoral and kinetically resolved in a reagent-controlled, CuâH-catalysed SiâO coupling with a chiral silane. Selectivity factors are high, indicating a larger steric effect than CH3 or C6H5groups.