A Novel Method for the Preparation of Acid-Sensitive Epoxides from Olefins with the Combined Use of Molecular Oxygen and Aldoacetal Catalyzed by a Cobalt(II) Complex
An efficient synthesis of acid-sensitive epoxides, such as chromene oxide or epoxide of γ,δ-unsaturated alcohol, was successfully achieved by the oxygenation of corresponding olefins with the combined use of an atmospheric pressure of molecular oxygen and aldoacetal catalyzed by a cobalt(II) complex coordinated with the 1,3-diketone ligand. The reactions proceeded under mild and neutral conditions
Structural effects in solvolytic reactions. 49. Steric effects as a major factor in the exo:endo rate ratios for the solvolysis of 2,7,7-trimethyl- and 2,6,6-trimethyl-2-norbornyl p-nitrobenzoates
作者:Herbert C. Brown、Shiro Ikegami、David L. Vander Jagt
DOI:10.1021/jo00208a004
日期:1985.4
Tropospheric OH formation by ozonolysis of terpenes
作者:T. Pfeiffer、O. Forberich、F.J. Comes
DOI:10.1016/s0009-2614(98)01208-1
日期:1998.12
The formation of hydroxyl radicals in the reaction of ozone with a number of monoterpenes has been searched for under true atmospheric conditions. In all cases OH is produced showing efficiencies in some cases approaching unity, that is for each ozone molecule that reacts about one OH molecule is detected. This observation makes the ozonolysis of the monoterpenes a significant source of OH in the troposphere, which competes under favourable conditions with the radiation-based production via ozone photolysis in the presence of water vapor. Another product formed in this reaction which has been observed simultaneously with OH is formaldehyde. (C) 1998 Elsevier Science B.V. All rights reserved.
SATTERWHITE, D. MICHAEL;CROTEAU, RODNEY B., J. CHROMATOGR., 407,(1987) 243-252
作者:SATTERWHITE, D. MICHAEL、CROTEAU, RODNEY B.
DOI:——
日期:——
Reaction of Singlet Oxygen with 2-Methylnorborn-2-ene, 2-Methylidenenorbornane, and their 7,7-Dimethyl Derivatives. The transition state geometry for hydroperoxidation
作者:Charles W. Jefford、Andr� F. Boschung
DOI:10.1002/hlca.19740570742
日期:1974.11.6
also gave a little norbornanone (presumably from the dioxetane) and 5 gave some endo-3,7,7-trimethylnorbornan-2-one as a secondary photo-product. It was found that the exo/endo attack ratios by singletoxygen on 3 and 5 are 66 and 0.19. By exploiting the C (3) monodeuteriated derivatives, 4 and 6 showed ratios of 28 and 0.67.