Attempts to prepare some 3-substituted azolo[1,2-<i>x</i>]azines, intermediates in the synthesis of azaaplysinopsin derivatives
作者:Lucija Jukić、Anton Čopar、Branko Stanovnik、Jurij Svete、Mateja Malešič、Aleš Krbavčič
DOI:10.1002/jhet.5570360506
日期:1999.9
Some 3-substituted pyrrolo[1,2-a]azines 4a-d were prepared in low yields from the corresponding 2-methylpyridines 1a,b and pyrazine derivatives 1c,d by quaternization with methyl bromoacetate followed by treatment with N,N-dimethylformamide dimethyl acetal. Ethyl 2-pyridinylacetate (5) and 2-pyridinylaceto-nitrile (6) were converted with 4-(2-bromo-1-dimethylaminoethylidene)-2-phenyl-5(4H)-oxazolone
通过用溴乙酸甲酯季铵化,然后用N,N-二甲基甲酰胺处理,由相应的2-甲基吡啶1a,b和吡嗪衍生物1c,d低产率制备一些3-取代的吡咯并[1,2- a ]嗪4a-d。二甲基乙缩醛。用4-(2-溴-1-二甲基氨基亚乙基)-2-苯基-5(4 H)-恶唑酮(9)将2-吡啶基乙酸乙酯(5)和2-吡啶基乙腈(6)转化为吡咯并[1, 2- α ]吡啶衍生物10和12是氮杂apaplysinopsins合成中的中间体。