10553-38-5Relevant articles and documents
Synthesis of camphoric anhydride via unsensitized photo-oxidation of camphorquinone
Ji, Shun-Jun,Lu, Jianmei,Lang, Jian-Ping,Horiuchi, C. Akira
, p. 1659 - 1663 (2002)
Camphorquinone undergoes a novel unsensitized photo oxidation in polar solvents such as alcohol under oxygen to give camphoric anhydride in 85% yield irradiated with a high-pressure mercury lamp. A possible mechanism is also presented in terms of results of experiment.
High-pressure-promoted uncatalyzed ketalization of ketones and oxy-Michael/ketalization of conjugated enones
Kumamoto, Koji,Ichikawa, Yoshiyasu,Kotsuki, Hiyoshizo
, p. 2254 - 2256 (2007/10/03)
A new practical method for ketalization or oxy-Michael/ketalization was developed using the high-pressure-promoted condensation of ketones or α,β-unsaturated ketones with alcohols in the presence of trialkyl orthoformates as water scavengers. Georg Thieme Verlag Stuttgart.
Ce(3+)-Exchanged Montmorillonite (Ce(3+)-Mont) as a Useful Substrate-Selective Acetalization Catalyst
Tateiwa, Jun-ichi,Horiuchi, Hiroki,Uemura, Sakae
, p. 4039 - 4043 (2007/10/02)
The acetalization of carbonyl compounds with methanol was investigated in the presence of a cation-exchanged montmorillonite (M(n+)-mont; M(n+) = Ce(3+), Zr(4+), Fe(3+), Al(3+), Zn(2+), H(+) and Na(1+).Ce(3+)-mont was found to be the most effective catalyst for substrate-selective acetalization.Cyclohexanones, benzaldehydes, and acid-sensitive 2-furancarboxaldehyde were converted nearly quantitatively to the corresponding acetals in methanol at 25 deg C in the presence of Ce(3+)-mont.The substrates were activated by a Lewis acidic Ce(3+) cation in the interlayer space on the order of 1 kJ mol-1 as measured by FT-IR.The turnover number was estimated to be up to 2.6E3 based on the number of active acid sites in Ce(3+)-mont.
