Synthesis of enantiopure 4-amino-3-hydroxymethyl-tetrahydroquinolines via an intramolecular nitrone cycloaddition
摘要:
Enantiopure 4-amiiio-3-hydroxymethyl-1,2,3,4-tetrahydroquinolines are synthesized by using an intramolecular cycloaddition of chiral nitrones prepared from aldehydes 5 and (R)-alpha-(hydroxym ethyl)benzylhydroxylamine. Reaction times of the nitrone cycloaddition were optimized by activation under MW-assisted conditions. The absolute configuration of the products was determined by X-ray analysis. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of enantiopure 4-amino-3-hydroxymethyl-tetrahydroquinolines via an intramolecular nitrone cycloaddition
摘要:
Enantiopure 4-amiiio-3-hydroxymethyl-1,2,3,4-tetrahydroquinolines are synthesized by using an intramolecular cycloaddition of chiral nitrones prepared from aldehydes 5 and (R)-alpha-(hydroxym ethyl)benzylhydroxylamine. Reaction times of the nitrone cycloaddition were optimized by activation under MW-assisted conditions. The absolute configuration of the products was determined by X-ray analysis. (c) 2007 Elsevier Ltd. All rights reserved.
Installation of protected ammonia equivalents onto aromatic & heteroaromatic rings in water enabled by micellar catalysis
作者:Nicholas A. Isley、Sebastian Dobarco、Bruce H. Lipshutz
DOI:10.1039/c3gc42188k
日期:——
A single set of conditions consisting of a palladium catalyst, a commercially available ligand, and a base, allow for several types of C–N bond constructions to be conducted in water with the aid of a commercially available “designer” surfactant (TPGS-750-M). Products containing a protected NH2 group in the form of a carbamate, sulfonamide, or urea can be fashioned starting with aryl or heteroaryl bromides, iodides, and in some cases, chlorides, as substrates. Reaction temperatures are in the range of room temperature to, at most, 50 °C, and result in essentially full conversion and good isolated yields.
nonreceptor TKs. Furthermore, the compound bearing the dioxolane nucleus was also able to inhibit in vivo tumor growth. Molecular modeling of these compounds into kinase domain suggested that the phenyl group allows favorable interaction energies with the target proteins: this feature is favored by fused dioxygenatedring at the 6,7 positions, whereas free rotating functions do not allow the correct placement
Substituted quinazolinones as kinase inhibitors endowed with anti-fibrotic properties
作者:Giovanni Marzaro、Ignazio Castagliuolo、Giulia Schirato、Giorgio Palu'、Martina Dalla Via、Adriana Chilin、Paola Brun
DOI:10.1016/j.ejmech.2016.03.053
日期:2016.6
Somenew3-substituted quinazolinones were synthesized and evaluated as inhibitors of kinases involved in fibrogenic process. The compounds were tested against a panel of both tyrosine and serine-threonine kinases. The profile of selectivity of some representative compounds was investigated through molecular docking studies. The most interesting compounds were also evaluated in vitro as potential agents
values against a panel of nine tumor cell lines, while not affecting nonmalignant fibroblasts. Indole 10 surpassed verubulin in seven tumor cell lines including colon, breast, ovarian, and germ cellcancercell lines. In line with docking studies indicating that compound 10 may bind the colchicine binding site of tubulin more tightly (Ebind=−9.8 kcal mol−1) than verubulin (Ebind=−8.3 kcal mol−1), 10 suppressed
A number of dioxolane, dioxane, and dioxepine quinazoline derivatives have been synthetized and evaluated as EGFR inhibitors. Their cytotoxic activity has been tested against two cell lines overexpressing and not expressing EGFR. Most derivatives were able to counteract EGF-induced EGFR phosphorylation, and their potency was comparable to the reference compound PD153035. The size of the fused dioxygenated