The regioselective lithiation of dithienothiazines followed by electrophilic trapping in a one-pot fashion is an efficient route to 2-mono- and 2,6-difunctionalized dithienothiazines. A pseudo five-component dilithiation-diformylation-double-Wittig olefination sequence gives a dithienothiazine symmetrically functionalized with ,-unsaturated ester side chains in excellent yield.
Synthesis and Electronic Properties of Conjugated
<i>syn</i>
,
<i>syn</i>
‐Dithienothiazine Donor‐Acceptor‐Donor Dumbbells
作者:Jennifer Nau、Vincent Brüning、Lukas Biesen、Tim‐Oliver Knedel、Christoph Janiak、Thomas J. J. Müller
DOI:10.1002/ejoc.202101398
日期:2022.1.17
Conjugated syn,syn-dithienothiazine donor-acceptor-donor dumbbells accessible by Suzuki coupling or a one-pot α-lithiation-zincation-Negishi coupling sequence are redox active low band gap luminophores.
可通过 Suzuki 偶联或单锅 α-锂化-锌化-Negishi 偶联序列获得的共轭 syn 、 syn-二噻吩噻嗪供体-受体-供体哑铃是氧化还原活性低带隙发光体。