Synthesis of 6-methoxy- and 6-chloro-2(1H)-pyridinone acyclo-C-Nucleosides from 2H-1,4-oxazin-2-ones.
作者:Lieven Meerpoel、Gert J. Joly、Georges J. Hoornaert
DOI:10.1016/s0040-4020(01)89920-8
日期:1993.5
Starting from 6-variated 3-methoxy- and 3-chloro-2H-1,4-oxazin-2-ones 4a–e the synthesis of a series of 6-methoxy- and 6-chloro-2(1H)-pyridinone acyclo-C-nucleosides 2a–d and 3a–d was accomplished. Diels-Alder reaction of the oxazinones 4a–e with propargyl bromide yielded the corresponding 3-bromomethylpyridines 5a–e, which underwent easy substitution of the bromine atom with the appropriate nucleophiles