Desulfurization and transformation of isothiocyanates to cyanamides by using sodium bis(trimethylsilyl)amide
摘要:
Sodium bis(trimethylsilyl)amide was first used as the desulfurizing agent for the conversion of isothiocyanates to cyanamides in a 'one-flask' reaction. Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
Synthesis and Reactivity of <i>N</i>-Allenyl Cyanamides
作者:James N. Ayres、Matthew T. J. Williams、Graham J. Tizzard、Simon J. Coles、Kenneth B. Ling、Louis C. Morrill
DOI:10.1021/acs.orglett.8b02225
日期:2018.9.7
N-Allenyl cyanamides have been accessed via a one-pot deoxycyanamidation–isomerization approach using propargyl alcohol and N-cyano-N-phenyl-p-methylbenzenesulfonamide. The utility of this novel class of allenamide was explored through derivatization, with hydroarylation, hydroamination, and cycloaddition protocols employed to access an array of cyanamide products that would be challenging to access
aldehydes to cyanamides was developed featuring a wide substrate scope and great functional group tolerability. This method allows for transformations of readily available, inexpensive, and abundant aldehydes to highly valuable cyanamides in a pot, atom, and step-economical manner with a green nitrogen source. This protocol will serve as a robust tool for the installation of the cyanamide moiety in various
A cascade process for directly converting nitriles (RCN) to cyanamides (RNHCN) <i>via</i> SO<sub>2</sub>F<sub>2</sub>-activated Tiemann rearrangement
作者:Guofu Zhang、Yiyong Zhao、Chengrong Ding
DOI:10.1039/c9ob01547g
日期:——
practical process for the direct conversion of nitriles to cyanamides was newly discovered and exhibited a wide substrate scope as well as great functional group-tolerability (36 examples). In this efficient strategy, the in situ generated amidoximes obtained from the reaction of nitriles with hydroxylamine subsequently underwent Tiemann rearrangement, producing the corresponding cyanamides with great
Synthesis of 2-Aminoimidazolones and Imidazolones by (3 + 2) Annulation of Azaoxyallyl Cations
作者:Maria C. DiPoto、Jimmy Wu
DOI:10.1021/acs.orglett.7b03719
日期:2018.2.2
The first examples of (3 + 2) annulations between azaoxyallyl cations and cyanamides and nitriles to give the corresponding 2-aminoimidazolones and imidazolones are reported. On the basis of the isolation of unexpected imidate products with certain substrates, it is proposed that the reaction proceeds via fast kinetic O-alkylation followed by rearrangement to the thermodynamically favored 2-aminoimidazolones
The cross-coupling of alkyl cyanamides with a number of aryl, heteroaryl, and vinylhalide and pseudohalide coupling partners has been developed via a modification of Pd-catalyzed amidation methods. The reactions proceed selectively under mild conditions with reasonable reaction times in moderate to excellent yields.