Catalytic Coupling of Carbon Dioxide with Terpene Scaffolds: Access to Challenging Bio-Based Organic Carbonates
作者:Giulia Fiorani、Moritz Stuck、Carmen Martín、Marta Martínez Belmonte、Eddy Martin、Eduardo C. Escudero-Adán、Arjan W. Kleij
DOI:10.1002/cssc.201600238
日期:2016.6.8
oxides and carbon dioxide into bio‐based cyclic organic carbonates catalyzed by Al(aminotriphenolate) complexes is reported. Both acyclic as well as cyclic terpene oxides were used as coupling partners, showing distinct reactivity/selectivity behavior. Whereas cyclic terpene oxides showed excellent chemoselectivity towards the organic carbonate product, acyclic substrates exhibited poorer selectivities
Constant-current electrolysis of geranyl acetate (2) in CH3CN-H2O afforded eight oxidation products (3-10) which were presumed to be formed through initial oxidation of the double bond at C6-C7. Based on the results of electrolysis of 2 in CH3CN-H218O, we have found that the oxygen atom(s) in the products (3-10) is(are) derived from water used as the reaction medium.
Synthesis of (±)-karahana ether and karahanaenone by selective cyclization of 6,7-epoxygeranyl acetate
作者:Alejandro F. Barrero、Enrique J. Alvarez-Manzaneda、P.Linares Palomino
DOI:10.1016/s0040-4020(01)89332-7
日期:1994.1
Efficient methods for preparing (±)-karahanaether (1b) and karahanaenine (2) from 6,7-epoxygeranyl acetate(3), by Lewis-acid-catalyzed electrophillic cyclization, are described.
Interaction of 6,7-epoxygeranyl acetate and of 10,11-epoxy-(E,E)-farnesyl acetate with fluorosulfonic acid
作者:N. D. Ungur、N. P. Popa、P. F. Vlad
DOI:10.1007/bf00630209
日期:1993.9
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作者:T. M. Khomenko、D. V. Korchagina、V. A. Barkhash
DOI:10.1023/a:1012449228670
日期:——
2,3-Epoxygeraniol undergoes dissimilar rearrangements in contact with liquid superacids at low temperature or on solid superacids at room temperature due to different location of the arising cationic center depending on the superacid character. 2,3-Epoxynerol, 6,7-epoxycitronellol, and 6,7-geranyl acetate on ZrO2SO42 afford the corresponding ketones via epoxy ring opening followed by 1,2-hydride shift. With 6,7-geranyl acetate 7-oxanobornane formed as a minor product. The mode of generation of the cationic center (either the olefin protonation or the epoxy ring opening) affects the rearrangement direction at similar conditions.