An Unanticipated Result in the Pd (0) Catalyzed Coupling of Sodium Adenate with<i>cis</i>-4-Acetyloxy- and<i>cis</i>-4-<i>t</i>-Butyldimethylsilyloxy-2-Cyclopentenyl Diethylphosphate
作者:Timothy T. Curran
DOI:10.1080/00397919608003730
日期:1996.3
The preparation of adenine regioisomers of (+/-)-cis-4-(TBSO)- and (+/-)-cis-4-(AcO)-2-cyclopentene is described using either Pd(0) coupling (silyl ether 2) or chloride displacement (acetyl chloride 10). An unexpected difference in reactivity between TBS- and Ac-O-protected allyl phosphates 2 and 7 in Pd(0) catalyzed coupling with sodium adenate was observed.
A Facile Synthesis of (−)-(4<i>R</i>,5<i>R</i>)-4,5-(<i>Iso</i>propylidenedioxy)-2-cyclopentenone, a Useful Precursor to<scp>d</scp>-Like Carbanucleosides
作者:Xue-Qiang Yin、Vasanthakumar P. Rajappan、Atanu Roy、Stewart W. Schneller
DOI:10.1081/scc-120018765
日期:2003.1.5
A facile synthesis of (-)-(4R,5R)-4,5-(isopropylidenedioxy)2-cyclopentenone ((-)-2), as a precursor to D-like carbanucleosides, is described in 5 steps from (1S,4R)-4-acetoxycyclopent-2-en-1-ol (3). Compound 3 has also been described in the literature as amenable to the formation of (+)-2, thus making both the D-like and L-like carbanucleosides available from the same readily available 3.