Clickable coupling of carboxylic acids and amines at room temperature mediated by SO<sub>2</sub>F<sub>2</sub>: a significant breakthrough for the construction of amides and peptide linkages
作者:Shi-Meng Wang、Chuang Zhao、Xu Zhang、Hua-Li Qin
DOI:10.1039/c9ob00699k
日期:——
carboxylic acids with amines was developed for the synthesis of a broad scope of amides in a simple, mild, highly efficient, robust and practical manner (>110 examples, >90% yields in most cases). The direct click reactions of acids and amines on a gram scale are also demonstrated using an extremely easy work-up and purification process of washing with 1 M aqueous HCl to provide the desired amides in
Methods and compositions for stimulating osteoblast proliferation or treating malignant cell proliferation and methods for selecting osteoblast proliferation stimulants
申请人:——
公开号:US20030119791A1
公开(公告)日:2003-06-26
The present invention relates to pharmacologically active compounds which are capable of binding to nuclear hormone receptors and are useful for the stimulation of osteoblast proliferation and ultimately bone growth. This invention also relates to the use of such compounds for the treatment or prevention of diseases and/or disorders associated with nuclear hormone receptor families.
Two Efficient <i>N</i>-Acylation Methods Mediated by Solid-Supported Reagents for Weakly Nucleophilic Heterocyclic Amines
作者:Kyungjin Kim、Kang Le
DOI:10.1055/s-1999-2987
日期:1999.12
Two efficient acylation methods utilizing solid-supported reagents have been developed for weakly nucleophilic heterocyclic amines. The novel approaches by chemoselective purification and polymeric-supported reagents facilitate library synthesis of diverse heterocyclic amides that are found in several pharmacophores.
Aminocarbonylation of aryl iodides with primary and secondary amines in aqueous medium using polymer supported palladium-N-heterocyclic carbene complex as an efficient and heterogeneous recyclable catalyst
作者:Ziyauddin S. Qureshi、Santosh A. Revankar、Mayur V. Khedkar、Bhalchandra M. Bhanage
DOI:10.1016/j.cattod.2012.03.039
日期:2012.12
secondary aromatic/aliphaticamines to corresponding amides using polymer supported palladium-N-heterocyclic carbene complex (PS-Pd-NHC) as an efficient heterogeneous, recyclablecatalyst is described. The catalytic system was optimized with respect to various reaction parameters to give excellent yield of desired products. The catalyst can be easily separated by simple filtration process and recycled further
Fluorescent anion sensing by bisquinolinium pyridine-2,6-dicarboxamide receptors in water
作者:Alejandro Dorazco-González、Marcos Flores Alamo、Carolina Godoy-Alcántar、Herbert Höpfl、Anatoly K. Yatsimirsky
DOI:10.1039/c3ra44363a
日期:——
Dicationic N-methylated at quinolyl moieties derivatives of three isomers of N,N′-bis(quinolyl)pyridine-2,6-dicarboxamide, and respective N-methyl quinolinium benzamides as reference compounds, have been prepared and characterized by crystal structures, spectral and acid–base properties in water. First pKa values of dicarboxamides between 8.1 and 9.3 determined spectrophotometrically are unusually low for amides. Dicarboxamide derivatives of 3- (1) and 6-aminoquinoline (2) undergo efficient fluorescence quenching by halide, acetate, pyrophosphate and nucleotide anions but the derivative of 5-aminoquinoline (3) shows very small quenching effects. The shape of Stern–Volmer plots for dicarboxamides indicates the existence of ground state complexation with anions, which is absent for related benzamides. Association constants, KA, with anions were calculated from analysis of concentration profiles of the quenching effects on the fluorescence of 1 and 2. Quenching by nucleoside triphosphates is much more efficient than by inorganic anions. Efficient binding of even simple inorganic anions by neutral amide N–H donors in water is attributed to high acidity of amides and preorganized rigid structure of the receptors.