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
Allenyloxime—a new source of heterocyclizations to stable cyclic nitrones
作者:Marian Buchlovič、Stanislav Man、Milan Potáček
DOI:10.1016/j.tet.2008.07.113
日期:2008.10
A variety of conditions including reductive and/or basic reagents in aqueous or alcoholic solution was applied to 2,2-dimethylpenta-3,4-dienal oxime. Formation of various five-membered heterocycles with excellent chemical selectivity was observed. Most of the reactions yielded cyclic nitrones with stable dipolar structure and unique functionalities present. All products of cyclization were isolated and fully characterized. (C) 2008 Elsevier Ltd. All rights reserved.
Diverse chemical behaviour of 2-hydroxy-functionalized pyrroline-1-oxide
作者:Marian Buchlovič、Stanislav Man、Milan Potáček
DOI:10.1016/j.tetlet.2010.08.103
日期:2010.11
The reactivity of 2-hydroxy-3,3,5-trimethyl-3,4-dihydro-2H-pyrrole 1-oxide was investigated. The title compound showed unexpected reactivity with several different types of reagents. (C) 2010 Elsevier Ltd. All rights reserved.
BAPAT, JAYANT, BHALCHANDRA;DURIE, A., AUSTRAL. J. CHEM., 1984, 37, N 1, 211-219
作者:BAPAT, JAYANT, BHALCHANDRA、DURIE, A.
DOI:——
日期:——
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