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Hypervalent organoiodine compounds: radical fragmentation of oxabicyclic hemiacetals. Convenient synthesis of medium-sized and spiro lactones

AuthorsArencibia, Teresa; Freire, Raimundo ; Perales, Áurea; Rodríguez Morales, María S. ; Suárez, Ernesto
Issue Date1991
PublisherRoyal Society of Chemistry (UK)
CitationJournal of the Chemical Society - Perkin Transactions 1991(12): 3349-3360 (1991)
AbstractPhotolysis of steroidal models of oxyabicyclic hemiacetals such as 2-oxabicyclo[4.4.0]decan-1-ol, 9-oxabicyclo[4.3.0]nonan-1-ol and 2-oxabicyclo[3.3.0]octan-1-ol, in the presence of (diacetoxyiodo)benzene and iodine afforded, through ring expansion, ten-, nine- and eight-membered lactones, respectively. Spiro lactones of dihydropyran-5-spirocyclohexan-2(3H)-one and dihydrofuran-4-spirocyclohexan-2(3H)-one types were obtained by photolysis of steroidal models of 2-oxabil cyclo[2.2.2]octan-1 -ol and 7-oxabicyclo[3.2.1 ]octan-1 -ol, respectively.
Description12 pages, 1 figure, 4 tables, 3 schemes.
Publisher version (URL)http://dx.doi.org/10.1039/P19910003349
Appears in Collections:(IPNA) Artículos
(IQFR) Artículos
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