An efficient copper catalyzed one-pot, four-component, and diastereoselective synthesis of highly functionalized ferrocenyl azetidinimines
作者:Siddan Gouthaman、Ponnusamy Shanmugam、Asit Baran Mandal
DOI:10.1016/j.tetlet.2013.04.002
日期:2013.6
An efficient, facile, and diastereoselectivesynthesis of highly functionalized ferrocenyl azetidinimines from copper catalyzed one-pot, four-component reaction of ferrocenealdehyde, aromatic amines, tosyl azide, and aryl alkynes in high yield has been accomplished. A plausible reaction mechanism is provided.
Enantiopure Ferrocene-Based Planar-Chiral Iridacycles: Stereospecific Control of Iridium-Centred Chirality
作者:Ross A. Arthurs、Muhammad Ismail、Christopher C. Prior、Vasily S. Oganesyan、Peter N. Horton、Simon J. Coles、Christopher J. Richards
DOI:10.1002/chem.201504458
日期:2016.2.24
azoline gave highly diastereoselective control over the new elements of planarchirality and metal‐based pseudo‐tetrahedral chirality, to give both neutral and cationic half‐sandwich iridacycles of absolute configuration Sc,Sp,RIr. Substitution reactions proceed with retention of configuration, with the planarchiralitycontrolling the metal‐centred chirality through an iron–iridium interaction in
[IrCp * Cl 2 ] 2与二茂铁基亚胺(Fc = NAr,Ar = Ph,p- MeOC 6 H 4)的反应导致二茂铁CH-活化和相对构型S p *的半三明治iridacycles的非对映选择性合成,R Ir *。(S)-2-二茂铁基-4-(1-甲基乙基)恶唑啉的扩展对平面手性和基于金属的拟四面体手性的新元素进行了非对映选择性控制,从而给出了绝对绝对的中性和阳离子半三明治iridacycles构型S c,S p,R Ir。取代反应继续保持构型,平面手性通过配位不饱和阳离子中间体中的铁-铱相互作用控制金属中心手性。
Catalytic Enantioselective Povarov Reactions of Ferrocenecarbaldehyde-Derived Imines - Brønsted Acid Catalysis at Parts-Per-Million Level Loading
ferrocenyl substrates have been employed in catalytic asymmetric settings only sporadically. Herein, catalytic asymmetric Povarov reactions with ferrocenecarbaldehyde‐derived N‐aryl imines are presented. This study demonstrates that the stereoelectronic properties of ferrocenyl imines do not preclude their engagement in enantioselective phosphoric acid catalysis: cycloadducts derived from benzyl N‐vinylcarbamate
Ferrocenylamines 2. Reductive methylation of secondary ferrocenylamines and ferrocenylaldimines: Synthesis, characterization of [(N-methyl-N-aryl)amino]methylferrocenes, 1-[(N-methyl-N-phenyl)amino]ethylferrocene and crystal structures of [(η5-C5H5)Fe(η5-C5H4CH2NHC6H4-Cl-4)] and [(η5-C5H5)Fe(η5-C5H4CH2N(CH3)-C6H4-OCH3-4)]
The reactions of ferrocenylaldimines (II) [(η5-C5H5)Fe(η5-C5H4CHNC6H4-R)] (R = 4-CH3O (a), 4-CH3 (b), H (c), 4-Cl (d), 3-Cl (e), 4-NO2 (f), 3-NO2 (g)) and ferrocenylketimine (I) [(η5-C5H5)Fe (η5-C5H4CH3CNC6H5)] with sodium borohydride in ethanol or lithiumaluminumhydride in THF resulted in secondary ferrocenylamines 3, 4. Reductive methylation of 3 (or II) and 4 with aqueous formaldehyde and sodium
Ferrocene-derived aminophosphonates showed their various ecotoxicological impact on terrestrial higher plants, freshwater ostracods and marine bacteria.