One-Pot Synthesis of Trisubstituted Triazenes from Grignard Reagents and Organic Azides
作者:Abdusalom A. Suleymanov、Rosario Scopelliti、Farzaneh Fadaei Tirani、Kay Severin
DOI:10.1021/acs.orglett.8b01214
日期:2018.6.1
and versatile method for the preparation of linear, trisubstituted triazenes is reported. The procedure is based on the reaction of Grignard reagents with 1-azido-4-iodobutane or 4-azidobutyl-4-methylbenzenesulfonate. These organic azides enable the regioselective formation of triazenes via an intramolecular cyclization step. The new method can be used for the preparation of aryl, heteroaryl, vinyl,
General and Efficient Synthesis of Indoles through Triazene-Directed C-H Annulation
作者:Chengming Wang、Huan Sun、Yan Fang、Yong Huang
DOI:10.1002/anie.201301742
日期:2013.5.27
Unprotected indoles are prepared with the title method, which has a wide scope for alkynes. Excellent regioselectivity was accomplished for aryl–alkyl and alkyl–alkyl disubstituted acetylenes. This reaction features an unusual 1,2 rhodium migration and ring‐contraction‐triggered NN bond cleavage. It allows rapid conversion of the reaction products into several functional molecules.
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
Thermal cis-to-trans isomerisation of triazene dyes in doped polymer films
作者:Ryan Tabone、Mónica Barra
DOI:10.1016/j.dyepig.2010.06.006
日期:2011.2
The kinetics of the thermal conversion of the cis to the trans isomeric forms of 1,3-diphenyltriazene and 1-phenyltriazenes derived from cyclic amines were determined in both poly(methyl methacrylate) and polystyrene doped films in the glassy state, using UV–visible absorption spectroscopy. The kinetics of 1,3-diphenyltriazene are well explained by a two-exponential function, whilst those of 1-phenyltriazene
The bifunctional Lewis acidic ionicliquid (LAIL) catalyzed multicomponent arylsulfonation of phenols with aryl triazenes and DABSO was developed. By using LAILs as redox and Lewis acidic catalysts without any additional promoter or ligand through an N2 extrusion/SO2 insertion sequence, various aryl triazenes were transformed into aryl sulfonyl radicals by coupling with DABSO, and these were then coupled
开发了双功能路易斯酸性离子液体 (LAIL) 催化苯酚与芳基三氮烯和 DABSO 的多组分芳基磺化。通过使用 LAILs 作为氧化还原和路易斯酸性催化剂,无需任何额外的促进剂或配体,通过 N 2挤出/SO 2插入序列,各种芳基三氮烯通过与 DABSO 偶联转化为芳基磺酰基自由基,然后与苯氧基自由基偶联得到相应的二芳基砜以良好的收率。良好的官能团耐受性、克级反应和避免使用 SO 2气体进一步证明了该芳基磺化反应的实用性。