An unusual NaH-mediated remote anionic 1,5-thia-Fries rearrangement reaction was developed. This method provides an efficient approach for the regioselective synthesis of not only 2-(2-hydroxyphenyl)-3-indole triflones but also related 3-sulfonylindoles.
Six transformations, one pot: Various di‐ and trisubstituted vinyl triflones, as well as several heteroaryl triflones, were stereoselectively synthesized from easily accessible gem‐dibromovinyl substrates (see scheme, Boc=tert‐butoxycarbonyl). The highlights of this synthetic method lie in the remote O→Cvinyl or N→Cvinyl triflyl migrations and the one‐pot, three‐step protocol.
Sechs Reaktionen ohne die Isolierung von Zwischenstufen ermöglichen die stereoselektive Synthese von di‐ und trisubstituierten Vinyltriflonen und Heteroaryltriflonen aus gem‐Dibromvinylsubstraten. In der Zuschrift auf . erkunden N. Shibata et al. die Schlüsselschritte dieses Verfahrens. Das Titelbild zeigt ein Gemälde im japanischen Stil von Mami Shibata (Studentin an der Tama‐Kunsthochschule), das den Namen “Kaze” (deutsch: Brise) hat. Die sechs Reaktionen verlaufen sehr sanft, so wie sich Vögel in einer Brise wiegen.
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