Intramolecular Cycloadditions of Photogenerated Azaxylylenes with Oxadiazoles Provide Direct Access to Versatile Polyheterocyclic Ketopiperazines Containing a Spiro-oxirane Moiety
作者:N. N. Bhuvan Kumar、Dmitry M. Kuznetsov、Andrei G. Kutateladze
DOI:10.1021/ol5033909
日期:2015.2.6
dinitrogen, yielding functionalized ketopiperazinoquinolinols containing an oxirane moiety fused to the quinolinole moiety while spiro-connected to diketopiperazine. These primary photoproducts are reactive versatile intermediates which can be further derivatized under nucleophilic SN1- or SN2-like ring opening of the oxirane moiety. The oxidized quinolinones undergo new rearrangements under the conditions
光生氮杂二烯经过1,3,4-恶二唑侧基的分子内环加成反应,伴随着二氮的释放,产生官能化的酮哌嗪子喹啉醇,含环氧乙烷部分与喹啉基部分融合,同时螺旋连接二酮哌嗪。这些主光产物是反应性的通用中间体可以下亲核S为进一步衍生Ñ 1-或S ñ 2样的环氧乙烷结构部分的开环。氧化的喹啉酮在施密特反应的条件下发生新的重排,导致前所未有的三氮杂氨基吲哚酮。