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- W1796634733 abstract "Abstract The reactivity of 2‐(prop‐2‐ynylthio)imidazoles under PdI 2 /KI‐catalyzed oxidative aminocarbonylation conditions has been studied. Under relatively mild conditions, 0.33–1 mol % of catalyst at 100 °C in MeCN and under 20 atm (at 25 °C) of a 4:1 mixture of CO/air, and in the presence of an equimolar amount of a secondary nucleophilic amine, substrates that are unsubstituted or bear a single substituent on the imidazole ring were converted directly in a multicomponent fashion into functionalized imidazothiazinones. This transformation occurred through a new auto‐tandem catalysis process that involves two concatenated catalytic cycles both catalyzed by PdI 2 : oxidative aminocarbonylation of the terminal triple bond/cyclocarbonylation. However, in the presence of an excess of secondary amine, 4,5‐disubstituted substrates led selectively to functionalized imidazothiazoles through an oxidative aminocarbonylation/conjugate addition process." @default.
- W1796634733 created "2016-06-24" @default.
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- W1796634733 creator A5014043087 @default.
- W1796634733 creator A5041654806 @default.
- W1796634733 creator A5042465788 @default.
- W1796634733 date "2015-06-10" @default.
- W1796634733 modified "2023-10-01" @default.
- W1796634733 title "Divergent Multicomponent Tandem Palladium-Catalyzed Aminocarbonylation-Cyclization Approaches to Functionalized Imidazothiazinones and Imidazothiazoles" @default.
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- W1796634733 doi "https://doi.org/10.1002/cctc.201500213" @default.
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