1,3-Dipolar cycloadditions of new 2,5-bifunctionalized five-membered cyclic nitrones
作者:Marian Buchlovič、Simona Hebanová、Milan Potáček
DOI:10.1016/j.tet.2012.01.043
日期:2012.4
A new family of five-membered cyclic nitrones bearing functional groups at positions 2 and 5 were tested in 1,3-cycloadditions with various dipolarophiles. These reactions gave the corresponding cycloadducts as single diastereomers in high yields. The reaction scope was examined, 23 compounds were isolated and fully characterized. The comparison of the reactivity was carried out by a study of reaction
A new approach to five-membered cyclicnitrones connected with the incorporation of a planar aromatic ring system into the structure is described. This procedure is based on an allenyloxime one-pot domino transformation under simple base catalysis in alcoholic and aqueous solvents. The structure of obtained nitrones was studied by X-ray analysis and the reactivity of products in 1,3-dipolar cycloadditions