636-04-4Relevant articles and documents
AMIDE AND THIOAMIDE BANDS OF BENZANILIDE AND THIOBENZANILIDE IN THE VIBRATIONAL SPECTRA
Petrov, I.,Grupce, O.
, p. 481 - 484 (1984)
It has been widely accepted that in secondary amides and secondary thioamides, in the spectral region between 1600 and 1200 cm-1 two characteristic bands could be recognized (Amide II and Amide III for amides and B and C bands for thioamides).Our spectra of benzanilide, C6H5(C=O)NHC6H5, and thiobenzanilide, C6H5(C=S)NHC6H5, show that in this region there are, at least, four prominent bands which shift on deuteration.That could indicate that all these bands are in connection with the vibrations of amide and/or thioamide groups.Some other amide and thioamide bands have been also discussed.
The structures of ring-expanded NHC supported copper(
Charman, Rex S. C.,Liptrot, David J.,Lowe, John P.,Mahon, Mary F.
supporting information, p. 831 - 835 (2022/02/01)
Three ring-expanded N-heterocyclic carbene-supported copper(i) triphenylstannyls have been synthesised by the reaction of (RE-NHC)CuOtBu with triphenylstannane (RE-NHC = 6-Mes, 6-Dipp, 7-Dipp). The compounds were characterised by NMR spectroscopy and X-ray crystallography. Reaction of (6-Mes)CuSnPh3 with di-p-tolyl carbodiimide, phenyl isocyanate and phenylisothiocyanate gives access to a copper(i) benzamidinate, benzamide and benzothiamide respectively via phenyl transfer from the triphenylstannyl anion with concomitant formation of (Ph2Sn)n. Attempts to exploit this reactivity under a catalytic regime were hindered by rapid copper(i)-catalysed dismutation of Ph3SnH to Ph4Sn, various perphenylated tin oligomers, H2 and a metallic material thought to be Sn(0). Mechanistic insight was provided by reaction monitoring via NMR spectroscopy and mass spectrometry.
Dehydrative Beckmann rearrangement and the following cascade reactions
Liu, Yinghui,Wei, Yongjiao,Xie, Lan-Gui
supporting information, (2021/11/16)
The Beckmann rearrangement has been predominantly studied for the synthesis of amide and lactam. By strategically using the in situ generated Appel's salt or Mitsunobu's zwitterionic adduct as the dehydrating agent, a series of Beckmann rearrangement and following cascade reactions have been developed herein. The protocol allows the conversion of various ketoximes into amide, thioamide, tetrazole and imide products in modular procedures. The generality and tolerance of functionalities of this method have been demonstrated.
