Chiral Phosphine-Catalyzed Enantioselective Construction of γ-Butenolides Through Substitution of Morita−Baylis−Hillman Acetates with 2-Trimethylsilyloxy Furan
作者:Ying-Qing Jiang、Yong-Ling Shi、Min Shi
DOI:10.1021/ja802422d
日期:2008.6.1
Chiral multifunctional phosphine (R)-N-(2'-diphenylphosphanyl-[1,1']binaphthalenyl-2-yl)methanesulfonamide L2 or (R)-N-(2'-diphenylphosphanyl-[1,1']binaphthalenyl-2-yl)acetamide L3 is an efficient catalyst in the allylic substitutions of MBH acetates 1 with 2-trimethylsilyloxy furan 2 to provide gamma-butenolides 3 in good to excellent yields and enantiomeric excesses in the presence of water.
Diels–Alder dimerization of Morita–Baylis–Hillman acetates catalyzed by organocatalysts
作者:Hong-Ping Deng、Yin Wei、Min Shi
DOI:10.1007/s11164-012-0626-6
日期:2013.1
DABCO-catalyzed dimerization of Morita–Baylis–Hillman acetates to synthesize a series of 3-alkyl-4-(E)-alkenyl-cyclohex-1-ene-1,4-dicarbonyl compounds in excellent yields with modest to excellent diastereoselectivity is reported. A plausible reaction mechanism is also proposed on the basis of previous literature and preliminary investigation the asymmetric version of the reaction.
Phosphine-Catalyzed Regiospecific Allylic Amination and Dynamic Kinetic Resolution of Morita−Baylis−Hillman Acetates
作者:Chang-Woo Cho、Jong-Rock Kong、Michael J. Krische
DOI:10.1021/ol049600j
日期:2004.4.1
Exposure of Morita-Baylis-Hillman (MBH) acetates to tertiary phosphine catalysts in the presence of 4,5-dichlorophthalimide enables regiospecific allylic substitution through a tandem S(N)2'-S(N)2' mechanism. Through the use of the chiral phosphine catalyst (R)-Cl-MeO-BIPHEP, chiral racemic MBH acetate 4 is converted to the corresponding allylicamination product in 80% yield and 56% enantiomeric excess
A one pot synthesis of (E)-4-alkylidene-2-cyclohexen-1-ones
作者:Ahlem Chamakh、Hassen Amri
DOI:10.1016/s0040-4039(97)10593-7
日期:1998.1
A one pot synthesis of (E)-4-alklidene-2-cyclohexen-1-ones 2 via a cross coupling of 2-(1-acetoxy alkyl) enones 1 and aliphatic 1,3-diketones in the presence of anhydrous potassium carbonate in absolute ethanol at reflux, is reported. (C) 1997 Elsevier Science Ltd. All rights reserved.
Synthesis of Functionalized Homoallylsilanes
作者:Rim Ouled Saad、Taïcir Ben Ayed、Jacques Lebreton、Hassen Amri
DOI:10.1081/scc-200032437
日期:2004.1.1
A convenient stereoselective synthesis of functional homoallylsilanes 2 has been developed by reaction of trimethylsilanylmethylmagnesium chloride on the Baylis-Hillman acetates 1, in anhydrous tetrahydrofuran (THF) in the presence of a catalytic amount of LiCuBr2.