14688-32-5Relevant academic research and scientific papers
Suzuki-Miyaura cross-coupling of 3,4-disubstituted 5-bromoisoxazoles: An efficient access to trisubstituted isoxazoles
Morita, Taiki,Nakamura, Hiroyuki,Tsuda, Masato
, (2021/06/07)
The Suzuki-Miyaura cross-coupling of 3,4-disubstituted 5-bromoisoxazoles 1 at the C5 position has successfully proceeded in the presence of Pd2(dba)3 and P(t-Bu)3·HBF4 catalysts to give the corresponding trisubstituted isoxazoles 3 in good to high yields while suppressing the formation of ketone 4 as a byproduct. The use of bulky phosphine ligand P(t-Bu)3·HBF4 is essential for the current transformation, and the formation of ketone 4, which was a major product in the previous report, was able to be suppressed under the current conditions.
One-pot synthesis of isoxazoles from enaminones: An application of Fe(II) as the catalyst for ring expansion of 2H-azirine intermediates
Zheng, Yunhui,Yang, Chao,Zhang-Negrerie, Daisy,Du, Yunfei,Zhao, Kang
, p. 6157 - 6160 (2013/10/22)
We report an application of FeCl2 as an inexpensive, nontoxic, and efficient catalyst in a clean ring expansion reaction of 2H-azirine derivatives, an intermediate formed through the PhI(OAc)2-mediated azirination of readily availabl
