Organocatalytic Aziridine Synthesis Using F<sup>+</sup> Salts
作者:Sean P. Bew、Shirley A. Fairhurst、David L. Hughes、Laurent Legentil、John Liddle、Paolo Pesce、Sanket Nigudkar、Martin A. Wilson
DOI:10.1021/ol901784m
日期:2009.10.15
This paper describes a unique application of the fluoronium cation (F+) as an organocatalyst for mediating the reaction between N-substituted imines and ethyl diazoacetate affording excellent yields of N-substituted aziridines.
The Mannich-typereaction of silylenolates with aldimines occurred smoothly with [emim]OTf as a solvent and without the addition of an activator to afford p-amino carbonyl compounds in excellent yields.
Synthesis and application of a new pseudo C2-symmetric tertiary diamine for the enantioselective addition of MeLi to aromatic imines
作者:Quentin Perron、Alexandre Alexakis
DOI:10.1016/j.tetasy.2007.10.018
日期:2007.10
A new tertiary pseudo C2-symmetric diamine derived from (1S,2S)-(+)-pseudoephedrine was synthesized and tested in the enantioselective addition of methyllithium on different aromatic imines. A comparative study with a similar C2-symmetric ligand derived from the cyclohexane diamine showed better reactivity and enantioselectivity up to 91%.
Synthesis of α-Aminoacetals via Decarboxylative Coupling of Imine and 2,2,-Diethoxyacetic Acid
作者:Seoksun Kim、Beomsoon Park、Geun Seok Lee、Soon Hyeok Hong
DOI:10.1021/acs.joc.2c01941
日期:——
Atom-economical C–C coupling between imines and a C1 source could provide α-aminoaldehyde derivatives. Nevertheless, such a coupling has rarely been achieved owing to the lack of appropriate nucleophilic C1 sources. In this study, photocatalytic synthesis of α-aminoacetals was achieved via decarboxylativecoupling of imine and 2,2-diethoxyacetic acid using a nonstoichiometric amount of a radical initiator
Chemoselective and stereoselective synthesis of gem-difluoro-β-aminoesters or gem-difluoro-β-lactams from ethylbromodifluoroacetate and imines during Reformatsky reaction
作者:Nicolas Boyer、Philippe Gloanec、Guillaume De Nanteuil、Philippe Jubault、Jean-Charles Quirion
DOI:10.1016/j.tet.2007.09.058
日期:2007.12
The chemoselective and stereoselective synthesis of gem-difluoro-beta-amiinoesters or genz-difluoro-beta-lactams was investigated from ethylbromodifluoroacetate and imines during Reformatsky reaction. Influence of various reaction parameters, such as nature of the amine part, nature of the chiral auxiliary, was evaluated. High levels of stereoselectivity (up to 98%) were obtained for gem-difluoro-beta-aminoesters and gem-difluoro-beta-lactams using either (R)-phenylglycinol or (R)-methoxyphenylglycinol. (c) 2007 Elsevier Ltd. All rights reserved.