293-96-9Relevant articles and documents
TRIPLET PHOTOCHEMISTRY OF MEDIUM RING TRIENES
Dauben, William G.,Michno, Drake M.
, p. 3263 - 3268 (1981)
The photochemistry of the triplets of 10- and 11-membered ring 1,3,5-trienes has been studied.At -70 deg C, cis,trans,cis-cyclodeca-1,3,5-triene goes only to the cis,cis,cis-isomer.At 25 deg C, this latter compound is converted into cis-bicyclodeca-2,4-diene via the thermally labile trans,cis,trans-cyclodeca-1,3,5-triene.At -70 deg C, cis,trans,cis-cycloundeca-1,3,5-triene is converted to the cis,cis,cis-isomer.At 25 deg C, this primary photochemical product undergoes a thermal 1,7-sigmatropic hydrogen migration to yield the trans,cis,cis-isomer.This latter triene upon sensitized irradiation yields cis-bicycloundeca-8,10-diene and trans-bicycloundeca-2,10-diene.The ratio of these latter two products changes with the temperature of the sensitized reaction.The possible mechanisms of these transformations are discussed.
Preparation method of 11- andrographolide compound and caprolactone compound (by machine translation)
-
Paragraph 0046-0070; 0075-0078, (2019/11/28)
To the method, cyclohexenone spiro-11 - peroxide is used as a raw material, a protic acid is used as a catalyst, fluorine alcohol is used as a solvent, and the reaction temperature is in a range of from 25 °C~60 °C about. The method has the advantages of high yield, low cost, convenience in operation, mild reaction conditions and the like, and is convenient for industrial application. (by machine translation)
Mechanism of the thermal decomposition of substituted tetraoxanes in benzene solution: Effect of substituents on the activation parameters of the unimolecular reactions
Cafferata,Eyler,Svartman,Canizo,Bor kowski
, p. 1058 - 1061 (2007/10/02)
-
On the Pyrolysis of Unsubstituted Cyclanes - Selectivity of the Formation of Reaction Products, Kinetic Parameters, Mechanistic Interpretations
Zimmermann, G.,Zychlinski, W.,Bach, G.,Rennecke, D.
, p. 10 - 20 (2007/10/02)
The thermal decomposition of cyclopentane (1), cyclohexane (2), cycloheptane (3), cyclooctane (4), cyclodecane (5), and cyclododecane (6) was studied in a laboratory-scale metallic tubular reactor at 650 to 850 deg C in the presence of steam.The kinetic parameters for the overall reactions were determined and the gaseous as well as the liquid reaction products were analyzed and identified by gas chromatography or by the coupling of gas chromatography and mass spectrometry, respectively.It could be shown that from all cyclanes the isomeric α-olefines are formed, if the conversion of the starting cyclanes is small.This supports the view that the cyclane - α-olefin isomerization is an important initial reaction in pyrolysis of 1 up to 6.The results also demonstrate that the main pathway of degradation is a radical chain mechanism via cyclanyl radicals with β(C-C) bond scission and 1.4 or 1.5-H-isomerization of alkenyl radicals as the most important reaction steps.