SELECTIVE OXIDATION OF ALLYLIC METHYLS IN MEDIUM RING COMPOUNDS
作者:Baldev R. Chhabra、Kiyoharu Hayano、Toshikazu Ohtsuka、Haruhisa Shirahama、Takeshi Matsumoto
DOI:10.1246/cl.1981.1703
日期:1981.12.5
Allylic methyls in medium ring compounds were selectively oxidized to primary alcohols and αβ-unsaturated aldehydes by means of t-butylhydroperoxide and selenium dioxide supported on silica gel.
NMR Studies on [2 + 3] Cycloaddition of Nitrile Oxides to Polyunsaturated Medium Size Rings
作者:Mirosław Gucma、Wiesław Marek Gołębiewski、Alicja K. Michalczyk
DOI:10.5935/0103-5053.20160078
日期:——
Site selectivity, regioselectivity and stereoselectivity of [2 + 3] cycloaddition of 4-trifluoromethylbenzonitrile oxide to polyunsaturated medium size rings including 1,5,9-cyclododecatriene, 11-membered sesquiterpenes, 1,3-cyclooctadiene and 5-vinyl-2-norbornene were examined. Site selectivity was correlated with electron charges of alkenyl carbon atoms. Structure of the products has been established by an extensive application of 1D and 2D H-1 and C-13 nuclear magnetic resonance (NMR) spectroscopy and electrospray ionization mass spectrometry. Some of the obtained products showed moderate fungicidal activities.
Gatilova, V.P.; Korchagina, D.V.; Gatilov, Yu.V., Russian Journal of Organic Chemistry, 1991, vol. 27, # 11.1, p. 2040 - 2054
The reaction of humulenes with aq. acetic acid afforded humulol and its acetate in an excellent yield together with various rearranged compounds.
葎烯与水溶液的反应。乙酸以极好的收率提供了腐植酸及其乙酸盐以及各种重排化合物。
A cyclisation of humulene
作者:J. M. Greenwood、M. D. Solomon、J. K. Sutherland、A. Torre
DOI:10.1039/j39680003004
日期:——
Reaction of the cycloundecatriene, humulene, with hypobromous acid gives a monocyclic and a tricyclic product. The latter has been converted into the cyclononadiene, caryophyllene, and the cycloundecatriene ring system has been regenerated from the tricycle in a variety of reactions. The mechanisms of these cyclisations and decyclisations are discussed. Bromination of cyclo-octa-1,4-diene is shown