N-Fluoroalkylation of amines was efficiently achieved using fluoroalkyl alcohols activated by 2,4,6-trichloro-1,3,5-triazine under mild and catalyst-free conditions.
Regioselective Preparation ofN7- andN9-Alkyl Derivatives ofN6-[(Dimethylamino)methylene]adenine Bearing an Active Methylene Group and Their Further Derivatization Leading to α-Branched Acyclic Nucleoside Analogues
trifluoroethyl-N6-[(dimethylamino)methylene]adenine (1, 2, 6, 7) were prepared regioselectively, the former by the direct alkylation of N6-[(dimethylamino)methylene]adenine, the latter by the alkylation of adenine followed by protection of the amino group. These derivatives, which bear an active methylene group, were submitted to reactions with allyl bromide, aldehydes or tert-butoxybis(dimethylamino)methane in