Towards a sustainable synthesis of aniline-derived amides using an indirect chemoenzymatic process: challenges and successes
作者:Samridhi Lal、Timothy J. Snape
DOI:10.1039/c3ra46499g
日期:——
A general, catalytic and sustainable synthesis of amides has been targeted which utilises a chemoenzymatic step to generate an activated amide coupling partner in situ. A screen of a series of known activating agents was performed and the successful agents taken forward to determine their utility in such a one-pot enzyme-catalysed process. In these studies, a new chemoselective reagent ((isopropylideneamino)
attracted much attention of organic chemists. In this paper, we developed a Ni(acac)2-catalyzed activation of unreactive alkanes with formanilides in the presence of carbonmonoxide to furnish moderate to excellent yields of amides. This is the first example of aminocarbonylation of inert alkanes using nickel-based catalyst, and formanilides is disclosed to be an interesting amine source owing to the peculiar
Electronic properties of anticonvulsant amides. A C-13 nuclear magnetic resonance study of phenylacetanilides.
作者:CHISAKO YAMAGAMI、NARAO TAKAO、YOSHITO TAKEUCHI
DOI:10.1248/cpb.31.4172
日期:——
Some twenty phenylacetanilides with p-and m-substituents in the aniline ring were prepared and their C-13 nuclear magnetic resonance spectra were measured. Substituent chemical shifts (SCS) of the para-carbon atom were examined by means of dual substituent parameter (DSP) and DSP-nonlinear resonance (DSP-NLR) equations. Excellent correlations were obtained by DSP analyses. The results indicate that the-NHCOCH2Ph moiety is a weak electron donor. The chemical shift data and derived correlations are very similar to those obtained for substituted propionanilides.
Substituted aryl 1,4-pyrazine derivatives and their use in treating anxiety disorders, depression and stress related disorders are disclosed.
本发明揭示了替代芳基1,4-吡嗪衍生物及其在治疗焦虑症、抑郁症和与压力相关的疾病中的应用。
Borane-Pyridine: An Efficient Catalyst for Direct Amidation
作者:P. Veeraraghavan Ramachandran、Aman Singh、Harry Walker、Henry J. Hamann
DOI:10.3390/molecules29010268
日期:——
Borane-pyridine acts as an efficient (5 mol%) liquid catalyst, providing improved solubility for the directamidation of a wide range of aromatic and aliphatic carboxylic acids and amines to form secondary and tertiary carboxamides. Tolerance of potentially incompatible halo, nitro, and alkene functionalities has been demonstrated.