A versatile entry into the synthesis of α-(monofluoromethyl) amino acids : Preparation of α-(monofluoromethyl) serine and (E)-dehydro-α-(monofluoromethyl) ornithine.
摘要:
A new entry to the synthesis of alpha-(monofluoromethyl) amino acids is described. The synthesis is based on a Strecker reaction on an alpha-(monofluoromethyl) ketone. As an example, alpha-(monofluoromethyl) serine was synthesized and used as starting material for a new synthesis of (E)-dehydro-alpha-(monofluromethyl ornithine.
2-Fluorinated methyl aminoacetonitriles are prepared by treating a corresponding fluorinated methyl ketimine magnesium halide with hydrogen cyanide or with an alkali metal cyanide or ammonium cyanide and a proton source.
Novel fluorinated alkenylene diamine derivatives are inhibitors of decarboxylase enzymes involved in polyamine formation and have the following general Formula I:-wherein:-
Ra represents hydrogen or R2, where R2 is as defined below;
Rb represents hydrogen or, when Ra is hydrogen, R2, where R2 is as defined below;
Rc represents hydrogen or -COR3, where R3 is as defined below;
R1 represents hydrogen or C1-C6 alkyl;
each R2 independently represents C2-C5 alkylcarbonyl, phenylcarbonyl, phenyl-(C1-C4 alkyl) carbonyl, or an aminocarboxylic acid residue derived by removal of an hydroxy group from a carboxy moiety of an L-aminocarboxylic acid;
R3 represents hydroxy, or, when Ra and Rb are both hydrogen, C1-C8 alkoxy, -NR4R5, where R4 and R5 are as defined below, or an aminocarboxylic acid residue derived by removal of a hydrogen atom from the amino moiety of an L-aminocarboxylic acid;
R4 and Rs independently represent hydrogen or C1-C4 alkyl; and
p represents 1 or 2.