Iron-Catalyzed Reductive Ethylation of Imines with Ethanol
作者:Marie Vayer、Sara P. Morcillo、Jennifer Dupont、Vincent Gandon、Christophe Bour
DOI:10.1002/anie.201800328
日期:2018.3.12
complex as precatalyst. This approach opens new perspectives in this area as it enables the synthesis of unsymmetric tertiary amines from readily available substrates and ethanol as a C2 building block. A variety of imines bearing electron‐rich aryl or alkyl groups at the nitrogen atom could be efficiently reductively alkylated without the need for molecular hydrogen. The mechanism of this reaction, which
Preparation of homoallylic amines <i>via</i> a three-component coupling process
作者:Xiaoxu Ou、Ricardo Labes、Claudio Battilocchio、Steven V. Ley
DOI:10.1039/c8ob01831f
日期:——
A three-componentsynthesis of homoallylicamines is described. The allylboronic species were generated in situ by homologation of vinyl boroxines with trimethylsilyldiazomethane, then followed by trapping of the allylboron intermediate with imines. Twenty-seven compounds were successfully prepared in moderate to high yields. Imines bearing various functional groups were tolerated, including aliphatic
Trimethylsilyl cyanide addition to aldimines and its application in the synthesis of (S)-phenylglycine methyl ester
作者:B.A. Bhanu Prasad、Alakesh Bisai、Vinod K. Singh
DOI:10.1016/j.tetlet.2004.11.015
日期:2004.12
reaction) in the presence of LiClO4 or BF3·Et2O in acetonitrile has been studied. The reaction provided the addition products in very high yields. The method has been successfully utilized for the synthesis of (S)-phenylglycine methyl ester.
Easy Access to <i>N,N</i>-Bis(but-3-enyl)-, <i>N</i>-Allyl-<i>N</i>-(but-3-enyl)-, and <i>N</i>-(But-3-ynyl)-<i>N</i>-(but-3-enyl)-amines
作者:Alan R. Katritzky、Satheesh K. Nair、Alina Silina
DOI:10.1021/jo020118t
日期:2002.10.1
5a-i were prepared in overall 74% yield from 1-(triphenylphosphoroylideneaminoalkyl)benzotriazole using an aza-Wittig reaction with aldehydes followed by a double Grignardreaction with allylmagnesiumbromide. Use of vinyl or 1-propynylmagnesium bromide and allylmagnesiumbromide in a sequential fashion also formed the expected doubly unsaturated amines 9a,b and 12, respectively.
Palladium-Catalyzed CH Activation of N-Allyl Imines: Regioselective Allylic Alkylations to Deliver Substituted Aza-1,3-Dienes
作者:Barry M. Trost、Subham Mahapatra、Martin Hansen
DOI:10.1002/anie.201501322
日期:2015.5.11
mode of activation of an imine via a rare aza‐substituted π‐allyl complex is described. Palladium‐catalyzed C(sp3)H activation of the N‐allyl imine and the subsequent nucleophilic attack by the α‐alkyl cyanoester produced the 1‐aza‐1,3‐diene as the sole regioisomer. In contrast, nucleophilic attack by the α‐aryl cyanoester exclusively delivered the 2‐aza‐1,3‐diene, which was employed in an inverse‐electron‐demand