Homologation of Monoterpenoids into New Sesquiterpenoidsvia Tandem Isomerisation/Claisen Rearrangement Reactions with Three-Component Ruthenium Catalysts, and Ru(methallyl)2(COD) Revealed by High Throughput Screening Techniques
作者:Jérôme Le Nôtre、Rachid Touzani、Olivier Lavastre、Christian Bruneau、Pierre H. Dixneuf
DOI:10.1002/adsc.200404391
日期:2005.5
system B based on a ruthenium source Ru3(CO)12, a bulky imidazolinium salt and Cs2CO3 appears very efficient for the transformation of a 1,7-diene into a γ,δ-unsaturated aldehyde via tandem isomerisation/Claisen reactions. 1,6-Dienes arising from the terpenoids menthone and myrtenal were selectively transformed into the corresponding unsaturated aldehydes with catalyst B. High throughput experiments were
基于钌源Ru 3(CO)12,庞大的咪唑啉鎓盐和Cs 2 CO 3的催化体系B对于将1,7-二烯通过串联异构化转化为γ,δ-不饱和醛非常有效/克莱森的反应。由萜烯类薄荷酮和Myrtenal产生的1,6-二烯用催化剂B选择性地转化为相应的不饱和醛。进行高通量实验以评估其他多组分催化剂:这些串联反应的金属源/配体/碱。发现意外的催化剂是Ru(甲基烯丙基)2(COD),无需其他配体或试剂即可操作。