Regio- and Stereoselectivity in the 1,3-Dipolar Cycloaddition Reactions of Isoquinolinium Ylides with Cyclopenta[a]acenaphthylen-8-ones
作者:Issa Yavari、Parisa Ravaghi、Maryam Safaei、Jasmine Kayanian
DOI:10.1055/s-0040-1706750
日期:2020.10
A convenient regio- and diastereoselective synthesis of functionalized 5a,5b-dihydro-5H,13H-naphtho[1′′,8′′:4′,5′,6′]pentaleno[1′:3,4]pyrrolo[2,1-a]isoquinolin-5-ones via 1,3-dipolar cycloaddition reaction of 8H-cyclopenta[a]acenaphthylen-8-ones with carbonyl-stabilized isoquinolinium N-ylides, is described. Based on DFT calculations at b3lyp/6-311+g(d,p) level of theory, a nonconcerted mechanism is
功能化 5a,5b-dihydro-5H,13H-naphtho[1'',8'':4',5',6']pentaleno[1':3,4]pyrrolo[2] 的方便区域和非对映选择性合成,1-a]isoquinolin-5-ones 通过 8H-cyclopenta[a]acenaphthylen-8-ones 与羰基稳定的 isoquinolinium N-ylides 的 1,3-偶极环加成反应进行了描述。基于 b3lyp/6-311+g(d,p) 理论水平的 DFT 计算,提出了一种非协调机制来解释该反应的区域选择性。典型产物的结构通过 X 射线晶体学分析得到证实。