A convenient synthesis of 2-methyl-3-oxoheptane-1,7-dicarboxylic esters and amides
摘要:
A range of simple derivatives of 2-methyl-3-oxoheptane-1,7-dicarboxylic acid have been prepared by Birch reduction/ methylation of 2,6-dimethoxybenzoic acid derivatives followed by solvolysis. (C) 2004 Elsevier Ltd. All rights reserved.
New activation of carboxylic acids by reaction with N,N-bis-(2-oxo-3-oxazolidinyl) phosphorodiamidic chloride (ClsPO)
作者:Juan Cabré-Castellví、Antonio Luis Palomo-Coll
DOI:10.1016/s0040-4039(00)93682-7
日期:1980.1
Pentacoordinated and quinquevalent phosphorus intermediates, have been isolated by reaction between the title reagent and carboxylic acids, prior to conversion into amides.
在转化为酰胺之前,已通过标题试剂与羧酸之间的反应分离出五配位和五价的磷中间体。
An efficient magnetic copper ferrite nanoparticle catalysed ligand and solvent free synthesis of N-aryl amide from aldoximes and iodobenzene
作者:Sachin A. Sarode、Jeevan M. Bhojane、Jayashree M. Nagarkar
DOI:10.1039/c5ra22777a
日期:——
A one pot dehydration, hydration and coupling reaction protocol for N-substituted amide formation.
一种用于N-取代酰胺形成的一锅脱水、水合和偶联反应方案。
A one-pot route to thioamides discovered by gas-phase studies: palladium-mediated CO<sub>2</sub> extrusion followed by insertion of isothiocyanates
作者:Asif Noor、Jiawei Li、George N. Khairallah、Zhen Li、Hossein Ghari、Allan J. Canty、Alireza Ariafard、Paul S. Donnelly、Richard A. J. O'Hair
DOI:10.1039/c7cc00865a
日期:——
A new palladium mediated "onepot" synthesis of thioamides from aromatic carboxylic acids (ArCO2H + RNCS [rightward arrow] ArC(S)NHR + CO2) was discovered by gas-phase experiments and theoretical studies. Palladium-mediated decarboxylation...
This study evaluated the effects of synthetic benzylamide compound I (2,6-dimethoxy-N-phenylbenzamide) on the ultraviolet B (UV B)-induced hyperpigmentation. of the skin. UV B-induced hyperpigmentation was elicited on brownish guinea pig skin according to the method reported by Hideya et al. [Arch Dermatol Res 290 (1998) 375] with minor modifications. A lightening effect was observed following the topical application of compound I on UV-stimulated hyperpigmentation. The skin returned to its original color after treatment with compound I. Fontana-Masson staining indicated that melanin level in the hyperpigmented area was significantly decreased in the compound I-treated animals. However, the number of melanocytes were not changed in the compound I-treated groups using the S-100 stain, which is an immunohistochemical method. In vitro experiments using the cultured melanoma cells showed a 31.7% inhibition of melanin production by compound 1 at 100 muM. In addition, this compound had no effect on the tyrosinase enzyme function. However, it exhibited a catalyzing effect on the dopachrome transformation into 5,6-dihydroxyindole-2-carboxylic acid. Overall, the pigment-lightening effects of the compound I may due to the dopachrome tautomerase stimulation. (C) 2003 Elsevier Inc. All rights reserved.