Sulphuric acid immobilized on silica gel (H<sub>2</sub>SO<sub>4</sub>–SiO<sub>2</sub>) as an eco-friendly catalyst for transamidation
作者:Sk. Rasheed、D. Nageswar Rao、A. Siva Reddy、Ravi Shankar、Parthasarathi Das
DOI:10.1039/c4ra16571c
日期:——
A novel method of transamidation of carboxamides with amines using catalytic amounts of H2SO4–SiO2 under solvent-free conditions has been developed. The scope of the methodology has been demonstrated with primary and secondary amines.
Palladium‐Catalyzed Annulation of Arylbenzamides with Diaryliodonium Salts
作者:Cheng Pan、Limin Wang、Jianwei Han
DOI:10.1002/adsc.202100860
日期:2022.1.18
By using diaryliodoniumsalts, a cylization has been accomplished in the synthesis of N-aryl phenanthridinone derivatives via a cascade of ortho-arylation and Csp2-N bond formation in the presence of palladium catalyst. The reaction exhibits a broad compatibility of readily available N-arylnaphthamides.
The invention is directed to a composition having a lanthanide chelate being a lanthanide and a ligand wherein the ligand is represented by the formula
wherein R1 is alkyl, aryl, or heteroaryl; R
2
is alkyl, aminoalkyl, aryl or heteroaryl; with the proviso that R
1
and R
2
cannot both be phenyl, and with the proviso that R
2
cannot be phenyl when R
1
is alkyl.
The invention is directed to a lanthamide chelate composition having a lanthamide, a charged amidate ligand, and a mono- or bidentate neutrally charged coordination compound, the composition being represented by structure I or structure II
wherein Ln
3+
designates lanthamide, R
1
is alkyl, aryl, or heteroaryl; R
2
is alkyl, aminoalkyl, aryl or heteroaryl; M is a neutrally charged monodentate coordination compound, M′ is a neutrally charged bidentate coordination compound, a=1 or 2; and wherein M and M′ comprise N, S, or O. It extends to the process of making the composition.
METHOD FOR IDENTIFYING ARTICLES AND PROCESS FOR MAINTAINING SECURITY
申请人:Reardon Damien F.
公开号:US20080305243A1
公开(公告)日:2008-12-11
The invention is directed to a method wherein at least a portion of a luminescent coating disposed on a surface of an article is exposed to ultraviolet light causing the luminescent coating to exhibit luminescence, detecting the luminescence, causing a comparison to be made between the luminescence and a predetermined standard, and classifying the article according to the comparison, wherein the luminescent coating has a luminescent chelate being a lanthanide and a ligand, the ligand being represented by the formula
wherein R
1
is alkyl, aryl, or heteroaryl; R
2
is alkyl, aminoalkyl; aryl or heteroaryl.