二茂铁配体在不对称烯丙基取代反应中的应用(英文)

doi:10.7523/j.issn.2095-6134.2004.3.021

中国科学院大学学报 ›› 2004, Vol. 21 ›› Issue (3): 413-417.DOI: 10.7523/j.issn.2095-6134.2004.3.021

二茂铁配体在不对称烯丙基取代反应中的应用(英文)

游书力, 侯雪龙, 戴立信

中国科学院上海有机化学研究所金属有机化学国家重点实验室, 上海 200032

收稿日期:2003-11-27 发布日期:2004-05-10
基金资助:
supported by the major state basic research program (973)(G2000077506) and National Natural Science Foundation of China (29790127,29872045)

Application of Chiral Ferrocene Ligands in Asymmetric Palladium Catalyzed Allylic Substitution Reactions

YOU ShuLi, HOU XueLong, DAI LiXin

State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China

Received:2003-11-27 Published:2004-05-10

摘要/Abstract

摘要：

以恶唑啉为导向基团，通过邻位锂化方便地高非对映选择性地合成了一系列平面手性二茂铁硫恶唑啉、硒恶唑啉和膦恶唑啉配体。应用于1，3二苯基烯丙基醋酸酯的烯丙基烷基化反应，ee值最高可达99%，膦氮配体在烯丙基胺化反应中，ee值最高也可达97%。此外，发现中心手性起到了决定产物ee值和绝对构型的作用，平面手性和中心手性的匹配在取得高对映选择性上是重要的。设计合成的一类平面手性二茂铁修饰的手性口袋型双膦配体，由于有平面手性的辅助而具有更有效的诱导效应。这类配体在前手性亲核试剂的不对称烯丙基化生成季碳氨基酸衍生物构及alpha位双取代季碳酮反应中，ee值最高分别可达到75%和95%。设计合成的1，1’二茂铁膦氮配体，在单取代的烯丙基醋酸酯的钯催化区域选择性及对映选择性的烯丙基烷基化及胺化反应中，显示了非常高的反应活性、区域选择性和对映选择性。配体中BINOL羟基由于和苄胺存在分子间氢键而对反应的选择性起到了关键作用，并从实验上给予了证明。

关键词: 不对称催化, 二茂铁, 平面手性

Abstract:

Thioether, selenide and phosphino derivatives of ferrocenyl oxazolines, synthesized from ferrocenyl oxazolines, were found to be effective in palladium catalyzed allylic alkylation with up to 99% ee. With P, N ligand, palladium catalyzed allylic amination was achieved with 97% ee. The enantio control was dominated by the central chirality. However, the match between planar chirality and central chirality is critical for high enantioselectivity. A series of planar chiral ferrocene modified bisphosphine pocket ligands were synthesized and found to be very effective in construction of quaternary carbon centers using asymmetric allylic alkylation. Some non coded alpha, alpha disubstituted amino acids were obtained with up to 75% ee using ketone imino esters. Using enolate of simple ketone as nucleophile, alpha, alpha disubstituted ketones were obtained with up to 95% ee. A new type of ferrocene based P, N ligands has been synthesized and was found to be very effective in regio and enantio selective palladium catalyzed allylic alkylation and amination of mono substituted allylic acetates. The free OH in the ligand was very important for selective control by the hydrogen bonding with benzylamine in later reaction, which was proved by experimental results.

Key words: asymmetric catalysis, ferrocene, planar chirality

中图分类号:

游书力, 侯雪龙, 戴立信. 二茂铁配体在不对称烯丙基取代反应中的应用(英文)[J]. 中国科学院大学学报, 2004, 21(3): 413-417.

YOU ShuLi, HOU XueLong, DAI LiXin. Application of Chiral Ferrocene Ligands in Asymmetric Palladium Catalyzed Allylic Substitution Reactions[J]. , 2004, 21(3): 413-417.

参考文献

[1] Li-Xin Dai, Xue-Long Hou, Wei-Ping Deng, Shu-Li You, Yong-Gui Zhou. The application of ligands with planar chirality in asymmetric synthesis. Pure Appl. Chem., 1999, 71: 1401-1405

[2] Li-Xin Dai, Tao Tu, Shu-Li You, Wei-Ping Deng, Xue-Long Hou. Asymmetric catalysis with chiral ferrocene ligands. Acc. Chem. Res., 2003,36: 659-667

[3] Shu-Li You, Yong-Gui Zhou, Xue-Long Hou, Li-Xin Dai. Enantioselective palladium catalyzed allylic substitution with chiral thioether derivatives of ferrocenyl-oxazoline and the role of planar chirality in this reaction.Chem. Commun., 1998, 2765-2766

[4] Shu-Li You, Xue-Long Hou, Li-Xin Dai. Synthesis of planar chiral selenide derivatives of ferrocenyl-oxazoline and their application in enantioselective palladium catalyzed allylic substitution reaction.Tetrahedron : Asymmetry, 2000, 11:1495-1500

[5] Shu-Li You, Xue-Long Hou, Li-Xin Dai, Yi-Hua Yu, Wei Xia. Role of planar chirality of S, N-and P, N-ferrocene ligands in palladium-catalyzed allylic substitutions. J. Org. Chem., 2002, 67: 4684-4695

[6] Shu-Li You, Xue-Long Hou, Li-Xin Dai, Bo-Xun Cao, Jie Sun. Novel bis-N-[2-(diphenylphosphino)-ferrocenylcarbonyl] diaminocyclohexane ligands: application in asymmetric allylic alkylation of imino esters with simple allyl carbonate.Chem. Commun., 2000, 1933-1934

[7] Shu-Li Yo, Xue-Long Hou, Li-Xin Dai, Xia-Zhen Zhu. Highly efficient ligandsfor palladium-catalyzed asymmetric alkylationof ketone enolates.Org. Lett., 2001, 3: 149-151

[8] Shu-Li You, Xia-Zhen Zhu, Xue-Long Hou, Li-Xin Dai. Synthesisof new diphosphine ligands and their applications in palladium-catalyzed allylic alkylation to construct chiral quaternary carbon center. Huaxue Xuebao, 2001, 59: 1667-1674

[9] Shu-Li You, Xue-Long Hou, Li-Xin Dai. Novel ferrocene modified P, N-ligands for enantioselective palladium-catalyzed allylic substitution reactions. J. Organometallic Chem., 2001, 637639: 762-766

[10] Shu-Li You, Yu-Mei Luo, Wei-Ping Deng, Xue-Long Hou, Li-Xin Dai. Palladium-catalyzed asymmetric allylic alkylationsof cycloalkenyl acetates with planar chiral phosphino-ferrocene carboxylic acids. J. Organometallic Chem., 2001, 637-639: 845-849

[11] Shu-Li You, Xia-Zhen Zhu, Yu-Mei Luo, Xue-Long Hou, Li-Xin Dai. Highly regio-and enantioselective Pd-catalyzed allylic alkylation and amination of monosubstituted allylic acetates with novel ferrocene P,N-ligands. J. Am. Chem. Soc., 2001, 123: 7471-7472

[12] Wei-Ping Deng, Shu-Li You, Xue-Long Hou, Li-Xin Dai, Yi-Hua Yu, Wei Xia, Jie Sun. Importance of planar chirality in chiral catalysts with three chiral elements: the role of planar chirality in 2'-substituted21,1'-P, N-ferrocene ligands on the enantioselectivity in Pd2catalyzed allylic substitution. J. Am. Chem. Soc., 2001, 123: 6508-6519

二茂铁配体在不对称烯丙基取代反应中的应用(英文)

Application of Chiral Ferrocene Ligands in Asymmetric Palladium Catalyzed Allylic Substitution Reactions

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