Study on the preparation of heteroaryl substituted enamines. A simple synthesis of heteroaryl substituted acetaldoximes from enamines
作者:Antončopar、Branko Stanovnik、Miha Tišler
DOI:10.1002/jhet.5570330240
日期:1996.3
tert-butoxybis(dimethylamino)methane was carried out on methyl substituted six-membered nitrogen containing heterocycles 1 to give enamines 2, which were easily transformed to oximes by treating with hydroxylamine hydrochloride in methanol. Most of them were isolated as (E, Z)-oximes of heteroarylacetaldehyde (11), but 5-(1,2,4-triazinyl) substituted derivatives as (E, Z)-oximes of 2,5-dihydro-1,2,4-triaz
对甲基取代的六元含氮杂环1进行了甲基对N,N-二甲基甲酰胺二甲基乙缩醛和叔丁氧基双(二甲基氨基)甲烷反应性的比较研究,得到烯胺2,烯胺2易被环己酮转化为肟在甲醇中用盐酸羟胺处理。它们中的大多数被分离为杂芳基乙醛(11)的(E,Z)-肟,但5-,1,2,4-三嗪基)取代的衍生物被2,5,2-二氢-1 (E,Z)-肟取代, 2,4-三嗪-(Z)-5-亚甲基乙醛(11t,11u和12)。肟最终被转化为相应的乙腈16和3-(二甲基氨基)丙烯腈17。