The effect of heterogeneous acid–base catalysis on conversion of 5-hydroxymethylfurfural into a cyclopentanone derivative
作者:J. Ohyama、R. Kanao、Y. Ohira、A. Satsuma
DOI:10.1039/c5gc01723h
日期:——
Acidic metal oxides, in particular Ta2O5, significantly enhanced the conversion of 5-hydroxymethylfurfural to a cyclopentanone derivative.
酸性金属氧化物,特别是Ta2O5,显著促进了5-羟甲基糠醛向环戊酮衍生物的转化。
Photo-Induced Intermolecular Radical<i>β</i>-Addition to Chiral<i>α</i>-(Arylsulfinyl) Enones
作者:Nobuyuki Mase、Yoshihiko Watanabe、Takeshi Toru
DOI:10.1246/bcsj.71.2957
日期:1998.12
The reactions of α-(arylsulfinyl) enones with alkyl radicals having a hydroxy or acetal group were examined under photo-irradiation in the presence of benzophenone. High diastereoselectivity was observed in the photo-induced radical reaction of 2-(arylsulfinyl)-2-cyclopentenones having a bulky aryl group, such as the 2,4,6-triisopropylphenyl or 2,4,6-trimethylphenyl group. The photo-induced reaction of 3-[(2,4,6-triisopropylphenyl)sulfinyl]-3-pentene-2-one in 1,3-dioxolane also gave a single diastereomer of the 1,3-dioxolan-2-yl adduct.
Effect of Cp*Iridium(III) Complex and acid co-catalyst on conversion of furfural compounds to cyclopentanones or straight chain ketones
作者:Yong-Jian Xu、Jing Shi、Wei-Peng Wu、Rui Zhu、Xing-Long Li、Jin Deng、Yao Fu
DOI:10.1016/j.apcata.2017.07.004
日期:2017.8
reaction is through 4 π-electrocyclic ringclosure process and HCPN was formed ultimately. Furthermore, we found that our Cp*Ir and acid co-catalyst system is suitable for a variety of furfural compounds. By using Cp*Ir, Brønsted acid can promote conversion of furfural compounds to straight chain ketones and Lewis acid can promote the rearrangement of furfural compounds to cyclopentanone derivatives.