Synthesis of Multisubstituted Cyclopentadienes from Cyclopentenones Prepared via Catalytic Double Aldol Condensation and Nazarov Reaction Sequence
作者:Yoichiro Kuninobu、Kazuhiko Takai、Yuta Nishina、Tomohiro Tatsuzaki、Ayano Tsubakihara
DOI:10.1055/s-0030-1260324
日期:2011.10
The rhenium-catalyzed synthesis of cyclopentenone derivatives via double aldol condensation and successive Nazarov reaction is described. The cyclopentenones were converted to the corresponding cyclopentadienes using organolithium reagents. Cyclopentadienes with four different substituents could be synthesized by stepwise double aldol condensation using a ketone and two types of aldehydes, followed by treatment with an organolithium reagent.
通过铼催化的双Aldol缩合反应及随后的Nazarov反应,描述了环戊烯酮衍生物的合成方法。环戊烯酮可利用有机锂试剂转化为相应的环戊二烯。通过逐步双Aldol缩合反应,以酮和两种醛为原料,随后用有机锂试剂处理,可以合成具有四种不同取代基的环戊二烯。