Conversion of N-Aromatic Amides to O-Aromatic Esters
摘要:
[GRAPHICS]N-Aromatic secondary amides can be transformed into O-aromatic esters in high yield via N-nitrosamide intermediates. The amides can be generated in situ from the corresponding aromatic amines or nitro compounds, and phenols can easily be made from the esters. The reaction can be modified by addition of methyl methacrylate or toluene at 0 degreesC to give polymerization or deamination, respectively. The rearrangement mechanism may involve radical formation and recombination.
A diverse set of highly substituted 4‐aminoquinolines was synthesized from ynamides, triflic anhydride, 2‐chloropyridine, and readily accessible amides in a mild one‐step procedure.
The reaction of N‐[2.2]paracyclophanyl‐substituted amides or amines with phenyliodine diacetate (PIDA) and proticnucleophiles affords mixed para‐substituted [2.2]paracyclophane derivatives in moderate to good yields. As proticnucleophiles carboxylic acids and alcohols as well as pyridine hydrobromide can be used. 4‐Hydroxy[2.2]paracyclophane reacts in an analogous manner.
Macro Rings. XII. Stereochemical Consequences of Steric Compression in the Smallest Paracyclophane<sup>1</sup>
作者:Donald J. Cram、Norman L. Allinger
DOI:10.1021/ja01628a067
日期:1955.12
5-Benzyl-1H-tetrazols from the reaction of 1-aryl-5-methyl-1H-tetrazoles with 1,2-dehydrobenzene
作者:Ashraf A. Aly、Raafat M. Shaker
DOI:10.1016/j.tetlet.2005.02.072
日期:2005.4
A series of 1-aryl-5-benzyl-1H-tetrazoles has been obtained during the reaction of 1-aryl-5-methyl-1H-tetrazoles with 1,2-dehydrobenzene. The mechanism of product formation was investigated. (c) 2005 Elsevier Ltd. All rights reserved.