The palladium-catalyzedcross-couplingreaction of 1-aryltriazenes with aryl- and alkenyltrifluorosilanes occurs readily at room temperature to yield the corresponding biaryl and stilbene products in moderate to good yields. In contrast to the previous results for the reaction with areneboronic acids, in which an additional Lewis acid such as boron trifluoride is essential for the activation of the
Kinetic Studies on the Thermal <i>cis</i>-to-<i>trans</i> Isomerization of 1-Phenyltriazenes Derived from Cyclic Amines
作者:Jinlong Fu、Kelvin Lau、Mónica Barra
DOI:10.1021/jo8024048
日期:2009.2.20
Rate constants for thermal cis-to-trans isomerization of N-(phenylazo)-substituted nitrogen ring heterocyles were determined as a function of phenyl ring substitution, cyclic amine ring size, and organic solvents. Observed first-order rate constants are found to increase with increasing electron-withdrawing character of the para substituent, with larger amine rings, and with increasing solvent polarity
A photo-promoted direct arylation of quinoxalin-2(1H)-ones with aryltriazenes under catalyst-free and ambient conditions was developed. The synthetic importance of this methodology was showcased by the simple operation, good functional group tolerance, gram-scale synthesis, and catalyst-free conditions.
在无催化剂和环境条件下,开发了一种光促进的 quinoxalin-2(1 H )-ones 与芳基三氮烯的直接芳基化反应。该方法的合成重要性通过简单的操作、良好的官能团耐受性、克级合成和无催化剂条件得到展示。
Wu Ziyan, Moore Jeffrey S., Tetrahedron Lett., 35 (1994) N 31, S 5539-5542