Simultaneous Generation of Methyl Esters and CO in Lignin Transformation
作者:Mingyang Liu、Buxing Han、Paul J. Dyson
DOI:10.1002/anie.202209093
日期:2022.10.4
Complete utilization of lignin: the methoxy groups in lignin react with carboxylicacids to generate methyl carboxylates (applied to the synthesis of pharmaceuticals), and the remaining carbon atoms of lignin react with oxygen to form CO predominantly, which may be used directly in carbonylation reactions.
The efficient synthesis of 2-arylindoles and 6H-isoindolo[2,1-a]indol-6-one through copper catalysed domino sp-sp(2) decarboxylative cross-coupling and subsequent cyclisation reactions of arylpropiolic acids with 2-iodotrifluoroacetanilide has been described. This methodology also demonstrates that indolo[1,2-c]quinazolin-6(5H)-one can be obtained with the elimination of trifluoromethyl anion. (C) 2012 Elsevier Ltd. All rights reserved.
Indol-2-yltributylstannane: A Versatile Reagent for 2-Substituted Indoles
作者:Sharada S. Labadie、Edmond Teng
DOI:10.1021/jo00094a042
日期:1994.7
A general method for 2-substituted indoles via the palladium-catalyzed coupling of indol-2-ylstannanes is described. (N-Methylindol-2-yl)tributylstannane (1) reacts with a variety of electrophiles under very mild conditions: [N-tert-Butoxycarbonyl)indol-2-yl]tributylstannane (3) is much less reactive in the coupling reactions and reacts only with certain activated electrophiles. [N-[[(Trimethylsilyl)ethoxy]methylindol-2-yl]tributylstannane (4) behaves similarly to 1 and the removal of the [(trimethylsilyl)ethoxy]methyl group can be achieved with tetra-n-butylammonium fluoride in DMF in the presence of ethylenediamine.
Labadie Sharada S., Teng Edmond, J. Org. Chem, 59 (1994) N 15, S 4250-4254