Synthetic Study of 1,3-Butadiene-Based IMDA Approach to Construct a [5−7−6] Tricyclic Core and Its Application to the Total Synthesis of C8-epi-Guanacastepene O
摘要:
An efficient intramolecular Diels-Alder (IMDA) strategy for the construction of the [5-7-6] tricyclic core (18) of guanacastepenes has been developed from cis-and trans-1,3-butadiene-tethered-4-oxopent-2- ynoic acid ethyl esters 10 and 11. This method facilitates the synthesis of C8-epi-guanacastepene O (36) in a very efficient manner.
Synthetic Study of 1,3-Butadiene-Based IMDA Approach to Construct a [5−7−6] Tricyclic Core and Its Application to the Total Synthesis of C8-epi-Guanacastepene O
摘要:
An efficient intramolecular Diels-Alder (IMDA) strategy for the construction of the [5-7-6] tricyclic core (18) of guanacastepenes has been developed from cis-and trans-1,3-butadiene-tethered-4-oxopent-2- ynoic acid ethyl esters 10 and 11. This method facilitates the synthesis of C8-epi-guanacastepene O (36) in a very efficient manner.
Gold-Catalyzed Tandem Cycloisomerization/Cope Rearrangement: An Efficient Access to the Hydroazulenic Motif
作者:Ziping Cao、Fabien Gagosz
DOI:10.1002/anie.201304497
日期:2013.8.19
Simply complex: The title reaction proceeds at a low loading of catalyst (1 mol %) and allows an efficient and stereoselective access to the hydroazulenicmotif, which is found in numerous natural products having significant biological activities. Tf=trifluoromethanesulfonyl, XPhos=2‐dicyclohexylphosphino‐2′,4′,6′‐triisopropylbiphenyl.
Synthetic Study of 1,3-Butadiene-Based IMDA Approach to Construct a [5−7−6] Tricyclic Core and Its Application to the Total Synthesis of C8-<i>e</i><i>pi</i>-Guanacastepene O
作者:Chuang-Chuang Li、Cui-Hua Wang、Bo Liang、Xin-Hao Zhang、Lu-Jiang Deng、Shuang Liang、Jia-Hua Chen、Yun-Dong Wu、Zhen Yang
DOI:10.1021/jo060996h
日期:2006.9.1
An efficient intramolecular Diels-Alder (IMDA) strategy for the construction of the [5-7-6] tricyclic core (18) of guanacastepenes has been developed from cis-and trans-1,3-butadiene-tethered-4-oxopent-2- ynoic acid ethyl esters 10 and 11. This method facilitates the synthesis of C8-epi-guanacastepene O (36) in a very efficient manner.