Synthesis of new representatives of 11,12-dihydro-5<i>H</i>-5,11-epoxybenzo[7,8]oxocino[4,3-<i>b</i>]pyridines – structural analogues of <i>integrastatins A, B</i>
作者:Ivan V. Kulakov、Alena L. Stalinskaya、Semyon Y. Chikunov、Yuri V. Gatilov
DOI:10.1039/d0nj06117d
日期:——
The Claisen–Schmidt condensation reaction of 3,5-diacetyl-2,6-dimethylpyridine with salicylic aldehyde in the presence of an acid unexpectedly afforded 1-((5S,11S)-2,5-dimethyl-11,12-dihydro-5H-5,11-epoxybenzo[7,8]oxocino[4,3-b]pyridin-3-yl)ethan-1-one as the product of intramolecular cyclization instead of α,β-unsaturated ketones (mono- or bis-azachalcones). The obtained 1-((5S,11S)-2,5-dimethyl-11
在酸存在下3,5-二乙酰基2,6-二甲基吡啶与水杨醛的Claisen-Schmidt缩合反应出乎意料地提供了1-((5 S,11 S)-2,5-二甲基-11,12-二氢-5 H -5,11-环氧苯并[7,8]氧辛基[4,3 - b ]吡啶-3-基)乙烷-1-酮作为分子内环化的产物,而不是α,β-不饱和酮(单-或bis-azachalcones)。获得的1-((5 S,11 S)-2,5-二甲基-11,12- dihydro-5 H -5,11-环氧苯并[7,8]氧辛基[4,3 - b ]吡啶-3- yl)than-1-one是HIV-1整合酶的天然抑制剂,即整合素A和B的紧密含氮结构类似物,含有四环环氧苯并氧杂环丁烷片段的表霉素C和表康康酮A。研究了对环化反应的底物范围和机理的见解。已显示用亚硒酸将氧辛环的亚甲基选择性氧化成羰基的可能性证明了合成的含吡啶类似物与整合他汀骨架的结构相似性。