Synthesis of the deuterated compounds diethyl-4-D-pyridine-2,6-dicarboxylate and diethyl-3,4,5-D3-pyridine-2,6-dicarboxylate by catalytic reductive debromination
作者:Wilhelm Herdering、Hans-Jörg Krüger
DOI:10.1002/(sici)1099-1344(199804)41:4<301::aid-jlcr81>3.0.co;2-p
日期:1998.4
The synthesis of the mono-and trideutero compounds diethyl-4-D-pyridine-2,6-dicarboxylate (4) and diethyl-3,4,5-D-3-pyridine-2,6-dicarboxylate (5) was achieved under a deuterium gas atmosphere by reductive debromination of diethyl-4-bromopyridine-2,6-dicarboxylate (1) and diethyl-3,4,5-tribromopyridine-2,6-dicarboxylate (2), respectively, using palladium black as catalyst and dichloromethane as solvent. The deuterium incorporation at the specified positions exceeded 95%.