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- W2973474620 endingPage "7334" @default.
- W2973474620 startingPage "7322" @default.
- W2973474620 abstract "In this paper, we report the regioselective synthesis of 3,5‐disubstituted isoxazoles by 1,3‐dipolar cycloaddition between alkynyl dipolarophiles and nitrile oxide dipoles generated in‐situ from O ‐silylated hydroxamic acids in the presence of trifluoromethanesulfonic anhydride and NEt 3 . Thanks to the mild, metal‐free and oxidant‐free conditions that this strategy offers, the reaction was successfully applied to a wide variety of alkynyl dipolarophiles, demonstrating the tolerance of this approach to diverse functional groups. In particular, we have shown that the method was compatible with biological molecules such as peptides and peptide nucleic acids (PNA). This protocol constitutes another example of metal‐free 1,3‐dipolar cycloaddition leading to the regioselective formation of isoxazoles." @default.
- W2973474620 created "2019-09-26" @default.
- W2973474620 creator A5005053668 @default.
- W2973474620 creator A5062591471 @default.
- W2973474620 creator A5078891699 @default.
- W2973474620 date "2019-09-19" @default.
- W2973474620 modified "2023-10-16" @default.
- W2973474620 title "Synthesis of 3,5-Disubstituted Isoxazoles through a 1,3-Dipolar Cycloaddition Reaction between Alkynes and Nitrile Oxides Generated from <i>O</i> -Silylated Hydroxamic Acids" @default.
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