N -alkynyl imides (ynimides): Synthesis and use as a variant of highly labile ethynamine
This study describes the first reliable synthesis of N-alkynyl imides (ynimides). This was accomplished with a copper-catalyzed coupling reaction between alkynyl(triaryl)bismuthonium salts and five-membered imides. We also found that it was possible to utilize N-ethynyl phthalimide as a variant of the highly labile ethynamine. 4-Amino-1,2,3-triazole was successfully obtained via the CuAAC reaction of N-ethynyl phthalimide with azide followed by hydrazinolysis of the phthaloyl protecting group.
Sueda, Takuya,Oshima, Ayumi,Teno, Naoki
supporting information; experimental part
p. 3996 - 3999
(2011/10/01)
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