获得了全合成五色菊素核心的有吸引力的中间体。通过从 5-甲基-4-(pyrrolydin-l'-yl)-5H-furan-2-one 的两个不同的非对映选择性反应序列合成顺式和反羟醛非对映异构体。将每种非对映异构体酯化并进行分子内 Diels-Alder 反应,从而产生具有刺五加素骨架环 A 和 C 的中间体。
Asymmetric synthesis of 5-(1-hydroxyalkyl)-5-methyl-5H-furan-2-ones
摘要:
The reactivity of 5-methyl-4-(pyrrolidin-1-yl)-5H-furan-2-one with aldehydes and with acyl chlorides followed by reduction was studied. The aldol condensation gave predominantly the anti aldol product when the acylation-reduction sequence led exclusively to the syn product. The use of a chiral pyrrolidine, (S)-2-methoxymethylpyrrolidine (SMP), allowed the synthesis of enantio-enriched compounds, the acylation-reduction leading to the (R,R) addition product. (C) 2003 Elsevier Ltd. All rights reserved.
Intramolecular Diels-Alder Strategy in a Synthetic Approach to the Eleutherobin Core
作者:Jacques Royer、Hélène Bruyère、Simona Samaritani、Stéphanie Ballereau、Alain Tomas
DOI:10.1055/s-2005-869830
日期:——
An attractive intermediate in the totalsynthesis of eleutherobin has been synthesised. The key step of this synthesis is an intramolecular Diels-Alder reaction, which leads to intermediate possessing rings A and C of theeleutherobin skeleton.
已经合成了刺五加苷全合成中的一种有吸引力的中间体。该合成的关键步骤是分子内 Diels-Alder 反应,该反应导致中间体具有刺五加苷骨架的 A 环和 C 环。
Approach to the Eleutherobin Core: Synthesis of a Key Intermediate by Intramolecular Diels-Alder Cycloaddition
作者:Jacques Royer、Hélène Bruyère、Catarina Dos Reis、Simona Samaritani、Stéphanie Ballereau
DOI:10.1055/s-2006-926456
日期:2006.5
the totalsynthesis of the eleutherobin core has been obtained. Both syn and anti aldol diastereoisomers were synthesized by two different diastereoselective reaction sequences from 5-methyl-4-(pyrrolydin-l'-yl)-5H-furan-2-one. Each diastereoisomer was esterified and subjected to an intramolecular Diels-Alder reaction, which led to an intermediate that possesses rings A and C of the eleutherobin skeleton
获得了全合成五色菊素核心的有吸引力的中间体。通过从 5-甲基-4-(pyrrolydin-l'-yl)-5H-furan-2-one 的两个不同的非对映选择性反应序列合成顺式和反羟醛非对映异构体。将每种非对映异构体酯化并进行分子内 Diels-Alder 反应,从而产生具有刺五加素骨架环 A 和 C 的中间体。
Asymmetric synthesis of 5-(1-hydroxyalkyl)-5-methyl-5H-furan-2-ones
The reactivity of 5-methyl-4-(pyrrolidin-1-yl)-5H-furan-2-one with aldehydes and with acyl chlorides followed by reduction was studied. The aldol condensation gave predominantly the anti aldol product when the acylation-reduction sequence led exclusively to the syn product. The use of a chiral pyrrolidine, (S)-2-methoxymethylpyrrolidine (SMP), allowed the synthesis of enantio-enriched compounds, the acylation-reduction leading to the (R,R) addition product. (C) 2003 Elsevier Ltd. All rights reserved.