From a 2,1-Benzazaarsole to Elusive 1-Arsanaphthalenes in One Step.
Vít KremláčekMilan ErbenRoman JamborAleš RůžičkaJan TurekElena RychagovaSergey KetkovLibor DostálPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2019)
The 2,1-benzazaarsole (1) showed a diene-like reactivity towards selected alkynes RC≡CR (R=CO2 Me, C5 F4 N) thus forming 1-arsa-1,4-dihydro-iminonaphthalenes 2 a and 3 a as hardly isolable intermediates, that underwent facile CH→NH proton migration leading to before elusive substituted 1-arsanaphthalenes 2 b and 3 b that could be completely structurally characterized.