The total synthesis of huperzine Q Was accomplished. The synthesis features the construction of the cis-hydrindane skeleton Diels-Alder reaction and a ring contraction reaction of an epoxyketone.
Rh(I)-Catalyzed [5 + 1] Cycloaddition of Vinylcyclopropanes and CO for the Synthesis of α,β- and β,γ-Cyclohexenones
作者:Guo-Jie Jiang、Xu-Fei Fu、Qian Li、Zhi-Xiang Yu
DOI:10.1021/ol2031526
日期:2012.2.3
A cationic Rh(I)-catalyzed [5 + 1] cycloaddition of vinylcyclopropanes and CO has been developed, affording either beta,gamma-cyclohexenones as major products or alpha,beta-cyclohexenones exclusively, under different reaction conditions.
DABO Boronate Promoted Conjugate Allylation of α,β-Unsaturated Aldehydes Using Copper(II) Catalysis
作者:Pjotr C. Roest、Nicholas W. M. Michel、Robert A. Batey
DOI:10.1021/acs.joc.6b00782
日期:2016.8.5
method for the selective 1,4-conjugate allylation of α,β-unsaturated aldehydes is reported. The method employs an air-stable diethanolamine-complexed boronic acid (DABO boronate) as the allyl transfer reagent and promotes conjugate addition over 1,2-addition. A variety of aryl- and alkyl-substituted enals are tolerated, providing δ,ε-unsaturated aldehyde products in good yields and selectivities under mild
The total synthesis of huperzine Q Was accomplished. The synthesis features the construction of the cis-hydrindane skeleton Diels-Alder reaction and a ring contraction reaction of an epoxyketone.