Merging supramolecular catalysis and aminocatalysis: amino-appended β-cyclodextrins (ACDs) as efficient and recyclable supramolecular catalysts for the synthesis of tetraketones
作者:Yufeng Ren、Bo Yang、Xiali Liao
DOI:10.1039/c6ra01002d
日期:——
β-CD were synthesized and employed in the catalytic synthesis of a series of tetraketones as supramolecular catalysts in water for the first time. Yields of 58–97% were obtained with up to 30 examples of substrate. The catalyst could be recycled easily, while a 92% yield and 84% rate of catalyst recovery could be achieved after 8 cycles of catalyst recycling. Moreover, a catalytic mechanism merging
作者:Ranganathan Velu、Pichandi Ashokkumar、Vayalakkavoor T. Ramakrishnan、Perumal Ramamurthy
DOI:10.1016/j.tetlet.2010.04.023
日期:2010.6
BisADD is a flexible acyclic moiety and a specificCa2+ sensor. Signaling of the binding events is achieved by the cation-induced folding of the bisADD-GNPs and the resultant fluorescence enhancement and visual color change are attributed to the suppression of photoinduced electron transfer (PET) through space and nano-Au aggregation. The selective binding of Ca2+ is clear from steady state fluorescence
ACRIDINEDIONE DERIVATIVES FOR TREATING PIGMENTATION DISORDERS AND AGEING OF THE SKIN
申请人:PIERRE FABRE DERMO-COSMETIQUE
公开号:US20140348768A1
公开(公告)日:2014-11-27
The present invention relates to a compound of general formula (I) in which: —R
1
and R
2
are simultaneously or independently H, OH, OCH
3
or a C
1
-C
5
alkyl radical, —R
3
and R
4
are simultaneously CH
3
, —or R
3
is H and R
4
is CH
3
, CH
2
CH
3
or an isopropyl radical or a phenyl radical, —R
5
is a C
4
-C
24
alkyl radical or a 3-phenylpropanyl or 2,2-diphenylethanyl radical.