Substituent effects on13C and15N chemical shifts in triazenes studied by principal components multivariate data analysis
摘要:
AbstractPrincipal components analysis was applied to the 13C and 15N chemical shift data on a series of fifteen 1‐(para‐substituted‐phenyl)‐3‐acetyl‐3‐methyltriazenes. It was found that the halogen‐substituted triazenes formed a class, based on substituent effects, which was different from the remaining eleven triazenes. A one‐component model described the halogen class, whereas a two‐component model was necessary for a description of the second class. In the second class, substituents tended to cluster to form groups depending on their electronic character.
Substituent effects on13C and15N chemical shifts in triazenes studied by principal components multivariate data analysis
摘要:
AbstractPrincipal components analysis was applied to the 13C and 15N chemical shift data on a series of fifteen 1‐(para‐substituted‐phenyl)‐3‐acetyl‐3‐methyltriazenes. It was found that the halogen‐substituted triazenes formed a class, based on substituent effects, which was different from the remaining eleven triazenes. A one‐component model described the halogen class, whereas a two‐component model was necessary for a description of the second class. In the second class, substituents tended to cluster to form groups depending on their electronic character.
Gold promoted arylative cyclization of alkynoic acids with arenediazonium salts
作者:Ulises A. Carrillo-Arcos、Susana Porcel
DOI:10.1039/c7ob02447a
日期:——
Alkynoicacids derived from salicylic acid and analogues undergo arylative cyclization with arenediazonium salts promoted by gold in the absence of external ligands. The reaction is thermally induced and proceeds even in the absence of light. A difference in regioselectivity has been found compared with that observed in the cycloisomerization process of the same type of compounds.
Substituent effects on13C and15N chemical shifts in triazenes studied by principal components multivariate data analysis
作者:W. J. Dunn、C. Lins、G. Kumar、T. Manimaran、S. Grigoras、U. Edlund、S. Wold
DOI:10.1002/omr.1270210710
日期:1983.7
AbstractPrincipal components analysis was applied to the 13C and 15N chemical shift data on a series of fifteen 1‐(para‐substituted‐phenyl)‐3‐acetyl‐3‐methyltriazenes. It was found that the halogen‐substituted triazenes formed a class, based on substituent effects, which was different from the remaining eleven triazenes. A one‐component model described the halogen class, whereas a two‐component model was necessary for a description of the second class. In the second class, substituents tended to cluster to form groups depending on their electronic character.
Murakami, Yasuoki; Tani, Masanobu; Tanaka, Kenjiro, Chemical and pharmaceutical bulletin, 1988, vol. 36, p. 2023 - 2035