Novel Quinidine-Derived Organocatalysts for the Asymmetric Substitutions of O-Boc-Protected Morita-Baylis-Hillman Adducts
作者:Cheng-Kui Pei、Xiu-Chun Zhang、Min Shi
DOI:10.1002/ejoc.201100501
日期:2011.8
A series of novelquinidine-derivedorganocatalysts was synthesized and utilized for the asymmetricsubstitution of O-Boc-protectedMorita–Baylis–Hillmanadducts with various carbamates and tosylcarbamates, affording the corresponding products in good to high yields (up to 91 % yield) with moderate to high ee values (up to 96 % ee) under mild conditions.
Enantioselective Synthesis of Highly Functionalized Trifluoromethyl-Bearing Cyclopentenes: Asymmetric [3+2] Annulation of Morita-Baylis-Hillman Carbonates with Trifluoroethylidenemalonates Catalyzed by Multifunctional Thiourea-Phosphines
作者:Hong-Ping Deng、Yin Wei、Min Shi
DOI:10.1002/adsc.201101012
日期:2012.3.16
synthesis of multifunctional thiourea‐phosphines, a catalytic method for the asymmetric [3+2] annulation of Morita–Baylis–Hillmancarbonates with trifluoroethylidenemalonates has been developed, affording highly functionalized trifluoromethyl‐bearing cyclopentenes in excellent yields, high diastereoselectivities and enantioselectivities under mild conditions.
Phosphine-catalyzed [3+2] cycloaddition of Morita—Baylis—Hillman carbonates to isothiocyanates in the synthesis of adamantane-containing trisubstituted aminothiophenes
作者:I. S. Zenkov、A. S. Abel、A. D. Averin、G. M. Butov、I. P. Beletskaya
DOI:10.1007/s11172-021-3162-y
日期:2021.5
An addition of the Morita—Baylis—Hillman (MBH) carbonates to adamantane-containing isothiocyanates was studied. The MBH carbonates react with 1-(4-isothiocyanatophenyl)-adamantane in the presence of triphenylphosphine to give 5-aryl-substituted adamantane-containing 2-amino-4-methoxycarbonylthiophenes in 31–59% yields, while 1- and 2-isothio-cyanatoadamantanes were found unreactive in this reaction.
Preparation of Chiral Multifunctional Thiourea-Phosphanes and Synthesis of Chiral Allylic Phosphites and Phosphane Oxides through Asymmetric Allylic Substitution Reactions of Morita-Baylis-Hillman Carbonates
作者:Hong-Ping Deng、Min Shi
DOI:10.1002/ejoc.201101365
日期:2012.1
We developed a synthetic method to prepare chiralmultifunctionalthiourea–phosphane catalysts for the asymmetricallylicsubstitutionreaction of Morita–Baylis–Hillmancarbonates with diphenyl phosphite or diphenylphosphane oxide to give allylicphosphites and allylicphosphaneoxides in high yields with excellent enantioselectivity.
Phosphine-catalyzed asymmetric [4+1] annulation of Morita–Baylis–Hillman carbonates with dicyano-2-methylenebut-3-enoates
作者:Xiao-nan Zhang、Hong-Ping Deng、Long Huang、Yin Wei、Min Shi
DOI:10.1039/c2cc34619b
日期:——
asymmetric [4+1] annulation of MBH carbonates with dicyano-2-methylenebut-3-enoates has been developed for the first time, providing an efficient and enantioselectivesynthesis of highlyfunctionalized cyclopentenes bearing one all-carbon quaternarystereogeniccenter.