Studies in azide chemistry. Part IX [1]. Investigations involving fluorinated azidopyrimidines and 4-azido-3-chloro-2,5,6-trifluoropyridine
作者:R.E. Banks、A. Prakash、N.D. Venayak
DOI:10.1016/s0022-1139(00)82318-0
日期:1980.10
4-Azido-2,5,6-trifluoro- and 4,6-diazido-2,5-difluoro- pyrimidine were obtained by treating tetrafluoropyrimidine with sodium azide in acetonitrile; similar azidation of 5-chlorotrifluoropyrimidine gave 4-azido-5-chloro-2,6-difluoro- and 4,6-diazido-5-chloro-2-fluoro-pyrimidine. Each monoazide reacted with triphenylphosphine to yield the corresponding iminophosphorane (Staudinger reaction), and the
用叠氮化钠在乙腈中处理四氟嘧啶,得到4-叠氮基-2,5,6-三氟-和4,6-二叠氮基2,5-二氟-嘧啶;5-氯三氟嘧啶的类似叠氮化得到4-叠氮基-5-氯-2,6-二氟-和4,6-二叠氮基-5-氯-2-氟-嘧啶。每种单叠氮化物与三苯基膦反应生成相应的亚氨基磷烷(施陶丁格反应),当与苯基乙炔[→4-苯基-1-(2,5,6-三氟-4-嘧啶基)-1, 2,3-三唑]和丙烯腈[→2-氰基-1-(2,5,6-三氟-4-嘧啶基)氮丙啶]; 五氟苯胺的钠盐对三氟叠氮化物的进攻产生了4-叠氮基-2,5-二氟-6-(五氟苯基氨基)嘧啶和双(4-叠氮基-2,5-二氟-6-嘧啶基)(五氟苯基)胺。尝试在两种单叠氮化物的热分解过程中截获腈。在二甲基亚砜,环己烷或五氟苯胺的存在下,将4-叠氮基-3-氯-2,5,6-三氟吡啶热解得到产物[py˚F NS(O)Me 2,PY ˚F NHC 6 ħ 11,和PY ˚F NNPh