SmI2 was used as reducing agent for the N-O bond cleavage in isoxazolidines. The procedure revealed is general and particularly useful for the transformation of 5-spirocyclopropane isoxazolidines to the corresponding beta-aminocyclopropanols, a troublesome transformation with other known reagents. (C) 2004 Elsevier Ltd. All rights reserved.
New synthesis of azepin-4-ones by flash vacuum thermolysis of dihydro and tetrahydroisoxazole-5-spirocyclobutane derivatives
作者:Andrea Goti、Alberto Brandi、Francesco De Sarlo、Antonio Guarna
DOI:10.1016/s0040-4039(00)85188-6
日期:1986.1
Azepin-4-ones () and () are synthesized by FlashVacuumThermolysis of the isoxazolines () and of the isoxazolidine () obtained by 1,3-dipolar cycloadditions to methylenecyclobutane.
1,3-Aminoalcohols by reductive cleavage of isoxazolidines with molybdenum hexacarbonyl
作者:Stefano Cicchi、Andrea Goti、Alberto Brandi、Antonio Guarna、Francesco De Sarlo
DOI:10.1016/s0040-4039(00)89062-0
日期:1990.1
GOTI A.; BRANDI A.; DE SARLO F.; GUARNA A., TETRAHEDRON LETT., 27,(1986) N 43, 5271-5274
作者:GOTI A.、 BRANDI A.、 DE SARLO F.、 GUARNA A.
DOI:——
日期:——
Rearrangement of isoxazoline-5-spiro derivatives. Part 7. Thermal rearrangement of 4,5-dihydro and tetrahydroisoxazole-5-spirocyclobutanes to azepin-4-one derivatives
作者:Andrea Goti、Alberto Brandi、Francesco De Sarlo、Antonio Guarna
DOI:10.1016/s0040-4020(01)89026-8
日期:——
respectively. When subjected to flash vacuum thermolysis conditions, the spiranic cycloadducts rearranged to afford mainly the desired azepin-4-one derivatives. In addition, the isoxazoline cycloadducts gave unexpected by-products, which were identified as 1-alkenyl-2-pyrrolidinones. Analogies and differences with respect to the lower homologue cyclopropanes are evidenced in both cycloaddition and rearrangement
SmI2 was used as reducing agent for the N-O bond cleavage in isoxazolidines. The procedure revealed is general and particularly useful for the transformation of 5-spirocyclopropane isoxazolidines to the corresponding beta-aminocyclopropanols, a troublesome transformation with other known reagents. (C) 2004 Elsevier Ltd. All rights reserved.