It has been revealed that 1-azirines having an ester function at C can be synthesized by the thermally induced skeletal rearrangement of 5-alkoxyisoxazoles and 5-alkylmercaptoisoxazles. Characterization of the azirines obtained was made by chemical reactions as well as by spectrometry. A further thermal transformation of azirine esters into oxazole derivatives could not be found. Mass spectra of representative
Organocatalyzed nucleophilic addition of pyrazoles to 2H-azirines: asymmetric synthesis of 3,3-disubstituted aziridines and kinetic resolution of racemic 2H-azirines
The first organocatalytic asymmetricnucleophilicaddition of arylpyrazoles to 2H-azirines and kinetic resolution of racemic 2H-azirines have been realized. Chiral aziridines were obtained with up to 98% yields and up...
A new hypervalent iodine(<scp>iii</scp>/<scp>v</scp>) oxidant and its application to the synthesis of 2<i>H</i>-azirines
作者:Guangtao Zhang、Yuanxun Wang、Jun Xu、Jiyun Sun、Fengxia Sun、Yilin Zhang、Chenglin Zhang、Yunfei Du
DOI:10.1039/c9sc05536c
日期:——
in acetic acid was found to afford a novel hypervalentiodine compound, in the structure of which both iodine(III) and iodine(V) moieties coexist. The nitro groups at the ortho phenyl positions were found to be crucial in stabilizing this uncommon structure. This novel hypervalentiodine(III/V) oxidant is proved to be effective in realizing the synthesis of 2-unsubstitued 2H-azirines via intramolecular
邻硝基碘苯与间CPBA 在乙酸中反应可得到一种新型高价碘化合物,其结构中碘 ( III ) 和碘 ( V ) 部分共存。人们发现邻苯基位置的硝基对于稳定这种不常见的结构至关重要。这种新型高价碘( III / V )氧化剂被证明可以有效地实现通过分子内氧化氮丙啶合成2-未取代的2H-氮丙啶,这是现有已知的高价碘试剂无法有效实现的。