Synthesis of Purine Nucleosides Built on a 3-Oxabicyclo[3.2.0]heptane Scaffold
作者:Ramon Flores、Albert Rustullet、Ramon Alibés、Angel Álvarez-Larena、Pedro de March、Marta Figueredo、Josep Font
DOI:10.1021/jo200775x
日期:2011.7.1
The photochemical [2 + 2] cycloaddition of chiral 3-chloro and 3-fluoro-5-hydroxymethyl-2(5H)-furanone to ethylene and acetylene has been studied. The effect of the halogen atom on the chemical yield and facial diastereoselectivity of the cycloaddition process has been evaluated. From the major anti cycloadducts, practical syntheses of several purine cyclobutane and cyclobutene-fused nucleosides containing