employed to investigate asymmetric Nicholas reactions. We found that the use of a chiral N-enoyl derivative provided acceptable levels of selectivity for an intermolecular Nicholas reaction, however, we were unable to identify an auxiliary that could be utilized in an asymmetric conjugate addition and a tandem inter/intramolecular series of Nicholas reactions. The use of chiral pool non-racemic propargyl
A T-type calcium channel inhibiting natural product cochlearoid B was synthesized for the first time in 7 linear steps via a convergent strategy exploiting the Suzuki–Miyaura cross coupling and the acid promoted Prins cyclization cascade. This strategy allows rapid access to its structural analogues for further therapeutical development.
New 5-hydroxy-2-furanone compounds having anti-inflammatory, immunosuppressive and anti-proliferative activity and are useful in treating psoriasis and modifying calcium homeostasis.
Synthesis of a highly functionalized tricyclic ring system related to guanacastepene via a tandem ring-closing metathesis reaction
作者:François-Didier Boyer、Issam Hanna
DOI:10.1016/s0040-4039(02)01793-8
日期:2002.10
A new approach to a highlyfunctionalized 5,7,6-tricyclic corestructure of guanacastepene has been developed using the tandem ring-closingmetathesis reaction of dienynes as the key step.