Catalyst-Free Strecker Reaction in Water: A Simple and Efficient Protocol Using Acetone Cyanohydrin as Cyanide Source
作者:Paola Galletti、Matteo Pori、Daria Giacomini
DOI:10.1002/ejoc.201100089
日期:2011.7
nitriles through a one-pot, three-componentStreckerreaction of a carbonyl compound, amine, and acetone cyanohydrin in water has been developed. Reactions proceed very efficiently without any catalyst at room temperature with high chemoselectivity and give, in some cases, the expected α-amino nitrile pure after direct separation from water. The protocol is particularly efficient for both aliphatic and
Mechanochemical Strecker Reaction: Access to α-Aminonitriles and Tetrahydroisoquinolines under Ball-Milling Conditions
作者:José G. Hernández、Mathias Turberg、Ingo Schiffers、Carsten Bolm
DOI:10.1002/chem.201603057
日期:2016.10.4
Strecker reaction for the synthesis of α‐aminonitriles was developed. The milling of aldehydes, amines, and potassiumcyanide in the presence of SiO2 gave the corresponding α‐aminonitriles in good to high yields. The high efficiency of the mechanochemical Strecker‐type multicomponent reaction allowed the one‐pot synthesis of tetrahydroisoquinolines after a subsequent internal N‐alkylation reaction.
cyanide to the in situ formed imines. A comparative study of the 31P-NMR (NuclearMagneticResonance) along with IR (Infrared) data analysis for the Kraft lignin and methylated Kraft lignin samples ascertained the importance of the free hydroxyl groups in the activation of the mechanochemical reaction. The solvent-free mechanochemical Strecker reaction was then coupled with a lactamization process leading
An enantioselective Strecker synthesis employing novel chiral titaniumcomplex catalysts derived from structurally simple chiral N-salicyl-β-amino alcohols is described. Reactions of N-benzylidenebenzylamine with trimethylsilyl cyanide in the presence of the catalyst (10 mol%) gave the corresponding α-aminonitrile in good to excellent yields, along with relatively high enantioselectivity (up to 86%
作者:Antony J. Davies、Michael S. Ashwood、Ian F. Cottrell
DOI:10.1080/00397910008087127
日期:2000.3
Abstract A convenient scaleable process for the preparation of substituted phenylglycines 2 by a modified Strecker reaction is described. Bisulfite-mediated addition of benzylamine and cyanide anion to substituted benzaldehydes 3 gave the aminonitriles 4 which were hydrolysed in two steps to the N-protected amino acid 1. Debenzylation using catalytic transfer hydrogenation gave the title compounds