72008-46-9Relevant articles and documents
Amberlyst-15-catalyzed intramolecular S(N)2' oxaspirocyclization of secondary allylic alcohols. Application to the total synthesis of spirocyclic ethers theaspirane and theaspirone
Young, Jenn-Jong,Jung, Liarng-Jyur,Cheng, Kuang-Ming
, p. 3415 - 3418 (2007/10/03)
A variety of substituted 1-oxaspiro[4.4]non-6-ene. 1-oxaspiro[4.5]dec-6- ene, 6-oxaspiro[4.5]dec-1-ene and 1-oxaspiro[5.5]undec-7-ene systems have been prepared by utilizing Amberlyst-15-catalyzed intramolecular S(N)2' oxaspirocyclizations of secondary allylic alcohols under mild reaction conditions in quantitative yields. This oxaspirocyclization was applied to the total synthesis of theaspirane and theaspirone from β-ionone in five steps. (C) 2000 Elsevier Science Ltd.
Photochemical Reactions 149. Photochemistry of 7,8-Dihydro-4-hydroxy-β-Ionone and Derivatives
Pascual, Alfons,Bischofberger, Norbert,Frei, Bruno,Jeger, Oskar
, p. 374 - 388 (2007/10/02)
The photolysis of 7,8-dihydro-4-hydroxy-β-ionone (6) was investigated together with its acetate and isopropyl ether 7 and 8, respectively.Irradiation (λ > 245 nm) of 6 in MeCN or i-PrOH at temperatures between 25 deg and -65 deg leads to the tricyclic eth
Studies on taxane synthesis. II. Syntheses of 3,8,11,11-tetramethyl-4-oxo- and 4,8,11,11-tetramethyl-3-oxo-bicyclo[5.3.1]undec-8-enes corresponding to the A- and B-rings of taxane diterpenes
Ohtsuka,Oishi
, p. 4722 - 4736 (2007/10/02)
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