Synthesis of conformationally restricted 1,2,3-triazole-substituted ethyl β- and γ-aminocyclopentanecarboxylate stereoisomers. Multifunctionalized alicyclic amino esters
作者:Loránd Kiss、Enikő Forró、Reijo Sillanpää、Ferenc Fülöp
DOI:10.1016/j.tet.2010.03.030
日期:2010.5
conformationally restricted β- or γ-amino esters with a cyclopentane skeleton were efficiently synthetized from the bicyclic β-lactam 6-azabicyclo[3.2.0]hept-3-en-7-one (1) and Vince γ-lactam (15) in five or six steps involving the azide–alkyne 1,3-dipolar cycloaddition of azido-substituted amino ester stereoisomers with nonsymmetric acetylenes. The azide–alkyne click reactions were investigated under thermal
从双环β-内酰胺6-氮杂双环[3.2.0] hept-3-en-7-高效合成1,2,3-三唑官能化,构象受限的具有环戊烷骨架的β-或γ-氨基酯的立体异构体一(1)和文斯(Vince)γ-内酰胺(15)分为五步或六步,涉及叠氮基-炔烃1,3-偶极环加成叠氮基取代的氨基酯立体异构体与非对称乙炔。在热和Cu(I)催化条件下研究了叠氮化物-炔烃的点击反应。令人惊讶地,热诱导的环加成反应选择性地提供了相应的1,4-三唑,这也响应于Cu(I)催化而选择性地发生。