Structural diversity through intramolecular cycloaddition and modulation of chemical reactivity in excited state. Synthesis and photoreactions of 3-oxa-tricyclo[5.2.2.01,5]undecenones: novel stereoselective route to oxa-triquinanes and oxa-sterpuranes
摘要:
Synthesis of 11-methyl-3-oxa-tricyclo[5.2.2.0(1,5)]undecenones by intramolecular Diels-Alder reaction of highly labile spiroepoxycyclohexa-2,4-dienones and its photochemical reactions upon tripler (T-3) and singlet (S-1) excitation leading to a stereoselective route to oxa-triquinane and oxa-sterpurane, respectively, is described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Synthesis and photoreactions of 3-oxa-tricyclo[5.2.2.01,5]undecenones: a novel, stereoselective route to oxa-triquinanes and oxa-sterpuranes
作者:Vishwakarma Singh、S.Q Alam、G.D Praveena
DOI:10.1016/s0040-4020(02)01280-2
日期:2002.11
The synthesis of 11-methyl-3-oxa-tricyclo[5.2.2.01,5]undecenones and their photochemical reactions upon triplet (3T) and singlet (1S) excitation is described. Oxidation of hydroxymethylphenol gave a ketoepoxide by intramolecular cycloaddition. Manipulation of the oxirane ring furnished the chromophoric systems. Triplet excitation of these gave tetracyclic compounds containing an oxatriquinane framework
Structural diversity through intramolecular cycloaddition and modulation of chemical reactivity in excited state. Synthesis and photoreactions of 3-oxa-tricyclo[5.2.2.01,5]undecenones: novel stereoselective route to oxa-triquinanes and oxa-sterpuranes
作者:Vishwakarma Singh、S.Q. Alam
DOI:10.1016/s0960-894x(00)00503-5
日期:2000.11
Synthesis of 11-methyl-3-oxa-tricyclo[5.2.2.0(1,5)]undecenones by intramolecular Diels-Alder reaction of highly labile spiroepoxycyclohexa-2,4-dienones and its photochemical reactions upon tripler (T-3) and singlet (S-1) excitation leading to a stereoselective route to oxa-triquinane and oxa-sterpurane, respectively, is described. (C) 2000 Elsevier Science Ltd. All rights reserved.