A lithium methoxide-catalyzed hetero Diels–Alder reaction of aromatic and aliphatic aldehydes with 1-methoxy-3-trimethylsilyloxy-1,3-butadiene (Danishefsky’s diene) is described. It proceeds through the Mukaiyama-Aldol reaction pathway and affords the corresponding 2,3-dihydropyran-4-one skeletons in good to excellent yields.
Hetero Diels-Alder reaction of aldimines derived from 3-indoleacetaldehyde and 3-indolecarboxaldehyde
作者:Yun Ming Lin、Taeboem Oh
DOI:10.1016/s0040-4039(96)02416-1
日期:1997.2
Aldimines derived from 3-indoleacetaldehyde and 3-indolecarboxaldehyde undergo Lewis acid catalyzed Diels-Alder reactions. We found that Zn(OTf)2 is an excellent promoter of hetero Diels-Alder reactions of imines with acidic α-hydrogens. Higher yields were obtained with aldimines from 3-indolecarboxaldehyde which does not have the acidic α-hydrogens.
Asymmetric aza-Diels-Alder reaction: enantio- and diastereoselective reaction of imine mediated by Chiral Lewis acid
作者:Kouji Hattori、Hisashi Yamamoto
DOI:10.1016/s0040-4020(01)80532-9
日期:1993.2
asymmetric aza-Diels-Alder reaction usingchiral boron mediator is developed. The key to its success is the use of the chiral boron complex prepared in situ from (R)- or (S)- binaphthol and B(OPh)3. The enantiomeric reaction of prochiral imine affords products of up to 90% ee. The double asymmetric induction of chiral imine using α-benzylamine as a chiralauxiliary is achieved with almost complete diastereoselectivity
Total Synthesis of Gambierol: The Generation of the A–C and F–H Subunits by Using a C-Glycoside Centered Strategy
作者:Utpal Majumder、Jason M. Cox、Henry W. B. Johnson、Jon D. Rainier
DOI:10.1002/chem.200500993
日期:2006.2.8
Gambierol, a representative of the marine ladder toxin family, consists of eight ether rings, 18 stereocenters, and two challenging pyranyl rings having methyl groups that are in a 1,3-diaxial orientation to one another. Herein we describe the generation of gambierol's A-C and F-H ring systems and demonstrate the versatility of the glycosyl anhydride, enol ether-olefin RCM strategy to fused polycyclic
Influence of the Diene in the Hetero-Diels-Alder Reaction Catalyzed by Dirhodium(II) Carboxamidates
作者:Michael P. Doyle、Marcela Valenzuela、Christine Hedberg、Wenhao Hu、Alexandra Holmstrom
DOI:10.1055/s-2004-832839
日期:——
Chiral dirhodium(II) carboxamidates catalyzehighly stereoselective hetero-Diels-Alderreactions of aromatic aldehydes with methyl-substituted Danishefsky's dienes with high turnover numbers. The methyl substituents of the diene influence both enantioselectivity in product formation and the rate of the reaction in the presence of chiral dirhodium(II) Lewis acids.
手性 dirhodium (II) carboxamidates 催化芳香醛与甲基取代的Danishefsky's 二烯的高立体选择性杂-Diels-Alder 反应,具有高周转数。二烯的甲基取代基影响产物形成的对映选择性和手性二铑 (II) 路易斯酸存在下的反应速率。