We have developed a new KI-catalyzed method for the imidation of an sp3 CâH bond adjacent to an amide nitrogen atom by using TBHP (tert-butyl hydroperoxide, 70% aqueous solution) as the oxidant. This novel procedure tolerated air and moisture and provided a series of novel products in moderate to excellent yields under mild conditions.
Reaction of N-(Dialkylaminomethyl) amides and N-(α-Dialkylaminobenzyl) amides with Sulfides and Cyanide
作者:HIDEO SAKAI、KEIICHI ITO、MINORU SEKIYA
DOI:10.1248/cpb.21.2257
日期:——
The substitution of the dialkylamine residue of N-(dialkylaminomethyl) amides with nucleophiles leading to the formation of the amidomethyl compounds, reported in several papers by Hellmann, et al. has been shown not to occur with sulfides and cyanide under the condition of heating in methanol preferably in the presence of sodium hydroxide, whereas the substitution of the amide residue is chiefly effected. By similar manners the substitution reactions of N-(α-dialkylaminobenzyl) amides with sulfides and cyanide have been also realized.
In sharp contrast to hypervalent iodine(III) compounds, the isoelectronic bromine(III) counterparts have been little studied to date. This knowledge gap is mainly attributed to the difficult-to-control reactivity of λ3-bromanes as well as to their challenging preparation from the highly toxic and corrosive BrF3 precursor. In this context, we present a straightforward and scalable approach to chelation-stabilized
Catalyst and Additive‐Free Direct Amidation/Halogenation of Tertiary Arylamines with
<i>N</i>
‐haloimide/amides
作者:Xiu‐Juan Xu、Adila Amuti、Abudureheman Wusiman
DOI:10.1002/adsc.202000796
日期:2020.11.18
developed for the amidation (halogenation) of tertiary arylamines by electrophilicactivation using N‐haloimide/amides. Several control experiments have been performed, and the coupling reaction outcomes indicated that the N‐haloimide/amide brings three major functions, including electrophilicactivation, aromatic halogenation and nucleophilic nitrogen sources. This cascade reaction features simple manipulation