DIANANE-CrIII-salen Complexes as Highly Enantioselective Catalysts for Hetero-Diels–Alder Reactions of Aldehydes with Dienes
作者:Albrecht Berkessel、Nadine Vogl
DOI:10.1002/ejoc.200600359
日期:2006.11
applied to the hetero-Diels–Alderreaction of Danishefsky’s diene with various aldehydes. The reactions afford the corresponding 2-substituted 2,3-dihydro-4H-pyran-4-ones in high yields and enantioselectivities (up to 96 % ee). The effect of different counteranions of the complex on reactivity as well as enantioselectivity has been investigated. Besides Danishefsky’s diene, reaction of the less reactive
Asymmetric Hetero-Diels–Alder Reaction of Danishefsky’s Dienes with α-Carbonyl Esters Catalyzed by an Indium(III)–PyBox Complex
作者:Bei Zhao、Teck-Peng Loh
DOI:10.1021/ol400841s
日期:2013.6.21
An efficient catalytic enantioselective hetero-Diels–Alderreaction of Danishefsky’s dienes with α-carbonyl esters using a chiral In(III)–pybox complex has been demonstrated. This protocol offers several advantages, including mildreaction conditions, relatively low catalyst loading, and good to excellent enantioselectivities. Furthermore, the absolute configurations of the new alkynyl-containing products
Asymmetric hetero-Diels–Alder reaction of glyoxylate esters and Danishefsky’s diene catalyzed by chiral bis(oxazoline)–lanthanide complexes
作者:Changtao Qian、Longcheng Wang
DOI:10.1016/s0040-4039(00)00144-1
日期:2000.3
Asymmetrichetero-Diels–Alderreactions of glyoxylate esters and Danishefsky’s diene catalyzed by various chiral bis(oxazoline)–lanthanide complexes afforded the corresponding aldol adducts, which upon treatment with trifluoroacetic acid, furnished the hetero-Diels–Alder product in up to 77% enantiomeric excess and 73% isolated yield.
Asymmetric hetero Diels-Alder reactions of Danishefsky's diene and glyoxylate esters catalyzed by chiral bisoxazoline derived catalysts
作者:Arun K. Ghosh、Packiarajan Mathivanan、John Cappiello、K. Krishnan
DOI:10.1016/0957-4166(96)00261-3
日期:1996.8
AsymmetricheteroDiels-Alderreactions of Danishefsky's diene and glyoxylate esters catalyzed by bis(oxazoline)-metal complex afforded the corresponding aldol adduct which upon treatment with trifluoroacetic acid furnished the heteroDiels-Alder product in 72% enantiomeric excess and 70% isolated yield.
Asymmetric hetero‐Diels‐Alder Reaction of
<i>trans</i>
‐1‐Methoxy‐3‐trimethylsilyloxy‐buta‐1,3‐diene Catalyzed by Zinc Complexes
作者:Matylda Stefaniak、Szymon Buda、Jacek Mlynarski
DOI:10.1002/ejoc.202000822
日期:2020.9.7
Catalyticasymmetric hetero‐Diels‐Alder (hDA) reaction of Danishefsky diene with α‐carbonyl esters have been performed with a zinc‐based catalyst that is readily available from zinc triflate and bisoxazoline ligands.