201486-55-7Relevant articles and documents
Oxidative organocatalytic chemoselective: N -acylation of heterocycles with aromatic and conjugated aldehydes
Ta, Linda,Sundén, Henrik
supporting information, p. 531 - 534 (2018/01/19)
Selective acylation of indoles is cumbersome often involving the need for sensitive and reactive acyl chloride derivatives or coupling reagents. Here we report a mild, functional group tolerant and highly chemoselective oxidative carbene catalyzed N-acylation of indoles with aldehydes. The acylation has a broad substrate scope and is compatible with substituents on both the aldehyde and the indole reaction partner. Furthermore, aza-heterocycles such as pyrrole and indazole can also be used as nucleophiles in this reaction providing the corresponding amide congeners in good yield.
One-Pot Michael Addition/Radical Cyclization Reaction of N -Acryloyl Indoles
Irwin, Lauren C.,Kerr, Michael A.
supporting information, p. 2859 - 2864 (2017/09/28)
From N -acryloyl indoles, ten examples of 1,2-annulated indole products were generated in a one-pot procedure via a Michael addition and radical cyclization mediated by Mn(OAc) 3.
2-(2-aminophenyl)-acetaldehyde dimethyl acetal: A novel reagent for the protection of carboxylic acids
Arai, Eri,Tokuyama, Hidetoshi,Linsell, Martin S.,Fukuyama, Tohru
, p. 71 - 74 (2007/10/03)
The synthesis and use of 2-(2-aminophenyl)-acetaldehyde dimethyl acetal 1 are described. The amides 2, derived from this amine and carboxylic acids, are stable under basic conditions and thus can be regarded as the protected carboxylic acids. The corresponding carboxylic acids are regenerated by conversion of 2 into indolylamides 3 by treatment with CSA and subsequent hydrolysis with LiOOH or NaOH. In addition, 3 can be easily converted to esters, amides, and aldehydes.