128572-45-2Relevant academic research and scientific papers
Use of 1,3-Dioxin-4-ones and Their Related Compounds in Synthesis. Part 28 . Asymmetric de Mayo Reactions Using Chiral Spirocyclic Dioxinones
Sato, Masayuki,Abe, Yoshito,Takayama, Kazuhisa,Sekiguchi, Keiko,Kaneko, Chikara,et al.
, p. 241 - 252 (2007/10/02)
The use of rigid spirocyclic dioxinones having 1-menthone as the chiral auxiliary as the enones in the photocycloaddition reactions opened novel methods for obtaining enantiomerically pure compounds, such as iridoids.Convex side preference of the sofa-conformation of these dioxinones in the photoaddition to cyclopentene increases up to 100percent by introducing either a bulky substituent or 5-hexenyl group at the 3-position to these dioxinones and, hence, highly asymmetric inter- and intramolecular de Mayo reactions have been disclosed.
Synthesis of 1,3-dioxin-4-ones and their use in synthesis. 21. Intramolecular photocycloaddition reactions of chiral spirocyclic dioxinones having ω-alkenyl groups at 3-position
Sato, Masayuki,Abe, Yoshito,Kaneko, Chikara
, p. 217 - 221 (2007/10/02)
Chiral spirocyclic dioxinones having an ω-alkenyl group at 3-position were synthesized and their intramolecular photocycloaddition reactions were examined.The results not only provide enantioselective synthetic route to 2S-acetonylcyclohexanecarboxylic acids but also clarify the reason why these dioxinones exhibit remarkable diastereofacial selectivities in both intra- and intermolecular photocycloaddition reactions.
Studies on Synthesis and Stereochemistry of 3-Methyloctahydroisocoumarins and 1-Methyloctahydro-3H-2-benzopyran-3-ones
Fujiwara, Yasuhiro,Okamoto, Masao
, p. 1458 - 1464 (2007/10/02)
Four stereoisomers of 3-methyloctahydroisocoumarins (4a-d) and two 1-methyloctahydro-3H-2-benzopyran-3-ones (10a,b) were synthesized.The stereochemical correlations including the configurations of the ring juncture and the methyl group and also the ring c
