Broadening the catalyst and reaction scope of regio- and chemoselective C–H oxygenation: a convenient and scalable approach to 2-acylphenols by intriguing Rh(ii) and Ru(ii) catalysis
catalyzed C–H oxygenation of aryl ketones and other arenes has been developed for the facilesynthesis of diverse functionalized phenols. The reaction demonstrates excellent reactivity, regio- and chemoselectivity, good functional group compatibility and high yields. The practicality of this method has been proved by gram-scale synthesis of a few different 2-acylphenols. Its utility has been well exemplified
A concise and efficient method was developed for the synthesis of chromeno[3,4- c ]chromene-6,7-dione using readily available bis(2-hydroxyphenyl)methanone and Meldrum's acid. The protocol displays a broad substrate scope and good functional group tolerance, including alkyl, alkoxyl, aryl and halogens. These π-extended scaffolds showed blue-green fluorescence with a large Stokes shift. The photophysical
NEAR-INFRARED-ABSORBING MATERIAL AND NEAR-INFRARED-ABSORBING FILTER
申请人:KIMURA Keizo
公开号:US20080073626A1
公开(公告)日:2008-03-27
The invention provides a near-infrared-absorbing material comprising at least one first compound selected from the group consisting of a singlet oxygen scavenger, a radical trapping agent and an antioxidant and at least one second compound represented by the following formula (II-1) or (II-2).
Near infrared ray absorbing material and near infrared ray absorbing filter
申请人:Kimura Keizo
公开号:US20080169453A1
公开(公告)日:2008-07-17
According to the present invention, there is provided a near infrared ray absorbing material comprising at least a first compound having a spectral absorption maximum wavelength of 470 nm or less in a range of 270 to 1600 nm in solution, and a second compound represented by the following formula (II-1) or (II-2).
where in the formulas, R
201
, R
202
, R
211
, R
212
, R
221
, and R
222
each represent, independently, a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group linked via a carbon atom; Z
201
and Z
202
represent a nonmetal atomic group necessary for forming a nitrogen-containing heterocycle; R
213
to R
216
and R
223
to R
226
represent a hydrogen atom or a substituent.