Direct Synthesis of Guanidines Using Di(imidazole-1-yl)methanimine
作者:Yong-Qian Wu、Sean K. Hamilton、Douglas E. Wilkinson、Gregory S. Hamilton
DOI:10.1021/jo0202381
日期:2002.10.1
A direct synthetic approach to guanidine compounds is reported here usingdi(imidazole-1-yl)methanimine and di(imidazole-1-yl)cyanomethanimine as guanylating reagents.
A simple solid-phase synthesis of disubstituted guanidines using Rink amide resin as an amine component
作者:Min Li、Lawrence J Wilson、David E Portlock
DOI:10.1016/s0040-4039(01)00162-9
日期:2001.3
A practical solid-phase synthesis that simply uses Rink amide resin as an amine component in reacting with aromatic isothiocyanates and aliphatic amines to generate disubstitutedguanidines is described. No special linker or guanylation reagents are involved in this method. The product is obtained in a ‘traceless-linker’ fashion and in high yield and purity when an electron-deficient isothiocyanate
v. Braun, Chemische Berichte, 1909, vol. 42, p. 2040
作者:v. Braun
DOI:——
日期:——
A Versatile Synthesis of Novel<i>N</i>,<i>N</i>,<i>N</i>″-Trisubstituted Guanidines
作者:C. R. Rasmussen、F. J. Villani, Jr.、B. E. Reynolds、J. N. Plampin、A. R. Hood、L. R. Hecker、S. O. Nortey、A. Hanslin、M. J. Costanzo、R. M. Howse, Jr.、A. J. Molinari
DOI:10.1055/s-1988-27606
日期:——
N,N,N″-Trisubstituted guanidines (most of them N″-aryl-N-azacycloalkanecarboximidamides) are prepared in generally good yields by S-methylation of monosubstituted thioureas with methyl iodide in methanol or acetone and reaction of the resultant methyl carbamimidothioate hydroiodides with secondary amines in boiling tert-butyl alcohol or acetonitrile.
Copper-catalysed C–H functionalisation gives access to 2-aminobenzimidazoles
作者:Peter R. Clark、Glynn D. Williams、Nicholas C. O. Tomkinson
DOI:10.1039/c9ob01651a
日期:——
This paper describes the development, optimisation and exemplification of a copper-catalysed C-H functionalisation to form pharmaceutically relevant 2-aminobenzimidazoles from aryl-guanidines. High throughput screening was used as a tool to identify a catalytically active copper source, DoE was used for reaction optimisation and a range of aryl-guanidines were prepared and exposed to the optimum conditions