Formation of benzylamines from triazene compounds via a 1,2-proton shift
摘要:
A new approach to benzylamines using triazene compounds has been developed that is facilitated by the lithiation of aryltriazenes followed by treatment with an electrophile. The regioselectivity of the reaction can be controlled by means of the substituents in the aryl group. The reaction contains the following steps: intramolecular carbon-carbon bond formation involving lithiation of an alkyl group on a 3-nitrogen atom; a 1,2-proton shift; and the subsequent release of nitrogen gas. Through the use of a deuterated triazene, we were able to determine that the reaction proceeds through a 1,2-proton shift. (c) 2006 Elsevier Ltd. All rights reserved.
Highly efficient palladium-catalyzed cross-coupling of diarylborinic acids with arenediazoniums for practical diaryl synthesis
作者:Fengze Wang、Chen Wang、Guoping Sun、Gang Zou
DOI:10.1016/j.tetlet.2019.151491
日期:2020.2
A highly efficient cross-coupling of cost-effective diarylborinic acids with both isolatable and latent arenediazoniums, i.e. tetrafluoroborates and aryltriazenes, respectively, has been developed with a practical palladium catalyst system under base-free conditions in open flask at room temperature. A variety of electronically and sterically various biaryls, in particular, those bearing a coordinative
Diazo Reactions with Unsaturated Compounds: IX. ortho-, meta-, and para-Nitrophenylsulfonyl-1,3-butadienes in Reaction with 1-Aryl-3,3-dimethyl-1-triazenes
作者:V. M. Naidan、V. V. Smalius
DOI:10.1007/s11176-005-0275-1
日期:2005.4
1-(m-Nitrophenylsulfonyl)- and 1-(p-nitrophenylsulfonyl)-1,3-butadienes in aqueous acetone in the presence of HCl and copper(I) or copper(II) chloride react with 1-aryl-3,3-dimethyl-1-triaenes to form 1-(m-nitrophenylsulfonyl)- and 1-(p-nitrophenylsulfonyl)-4-aryl-3-chloro-1-butenes, respectively. 1-(o-Nitro-phenylsulfonyl)-1,3-butadiene fails to react in similar conditions.
Some para-substituted 1-aryl-3,3-dimethyltriazenes were oxidized with tert-butyl hydroperoxide in the presence of vanadium pentoxide as a catalyst. Under these conditions, the corresponding 1-aryl-3-formyl-3-methyltriazenes, 1-aryl-3-tert-butylperoxymethyl-3-methyltriazenes, and p-nitrobenzenes were obtained. The 1-aryl-3-formyl-3-methyltriazenes might play a role in the metabolic oxidation of the
Diazo reactions with unsaturated compounds: VIII. Reaction of 1,3-butadiene and isoprene with aromatic and aliphatic-aromatic triazenes in the presence of sulfur(IV) oxide
作者:V. M. Naidan、V. V. Smalius
DOI:10.1007/s11176-005-0016-5
日期:2004.9
1,3-Butadiene and 2-methyl-1,3-butadiene react with 1,3-diphenyltriazene, 1,3-di-p-tolyltriazene, and 1-aryl-3,3-dimethyl-1-triazenes in a sulfur(IV) oxide-saturated water-acetic acid-acetone solution containing NaCl or hydrochloric acid, and catalytic amounts of copper(I) chloride to form 1,4-arylsulfonyl-chlorination products.
Diazo Reactions with Unsaturated Compounds: X. Reactions of p-Chloro- and p-Bromophenysulfonyl-1,3-Butadienes with Aryldiazonium Chlorides and 1-Aryl-3,3-dimethyl-1-triazenes
作者:V. M. Naidan、V. V. Smalius
DOI:10.1007/s11176-005-0508-3
日期:2005.11
1-(p-Chlorophenylsulfonyl)- and 1-(p-bromophenylsulfonyl)-1,3-butadienes in aqueous acetone solutions in the presence of cuprous chloride or cupric chloride react with aryldiazonium chlorides and 1-aryl-3,3-dimethyl-1-triazenes to form 1-(p-chlorophenylsulphonyl)- and 1-(p-bromophenylsulfonyl)-4-aryl-3-chloro-1-butenes, respectively.