One-Pot Synthesis of Hantzsch Pyridines<i>via</i>NH<sub>4</sub>I Promoted Condensation of 1,3-Dicarbonyl Compounds with DMSO and NH<sub>4</sub>OAc
作者:Liming Chang、Junyi Lai、Gaoqing Yuan
DOI:10.1002/cjoc.201600255
日期:2016.9
A one‐pot synthesis of Hantzsch pyridines was achieved through NH4I‐promoted condensation of 1,3‐dicarbonylcompounds with DMSO and NH4OAc, in which the C4 of the pyridine rings was derived from DMSO and the nitrogen atom resulted from NH4OAc and NH4I. The target product could be obtained in moderate to excellent yields.
Photooxidation of acridine(1,8)dione dyes: flash photolysis investigation of the mechanistic details
作者:N. Srividya、P. Ramamurthy、V. T. Ramakrishnan
DOI:10.1039/b005502f
日期:——
Photolysis of the acridinedione dyes leads to the formation of different products depending on the substitutents. The cationic radical and the solvated electron are the primary photoproducts. Flashphotolysis studies show that the solvated electron subsequently reacts with the ground state molecule to give the anion radical. The enolic form of the cation radical is also observed as an intermediate
Efficient synthesis of quinazolinones as intermediates of CNS agents via inverse-electron demand Diels–Alder reaction
作者:Estibaliz R. Bilbao、Mario Alvarado、Christian F. Masaguer、Enrique Raviña
DOI:10.1016/s0040-4039(02)00563-4
日期:2002.5
Enaminones undergo inverse electron demand Diels–Alder reaction with 1,3,5-triazine, allowing access to functionalised quinazolinones as intermediates in the synthesis of CNSagents. This reaction is highly dependent of the solvent: 1,3,5-triazine undergoes single or double [4+2] cycloadditions with enaminones, and quinazolinones or acridinediones can be selectively obtained.
Design of receptors for urea derivatives based on the pyrido[3,2-g]indole subunit
作者:Vidyadhar Hegde、Chi Ying Hung、Puttannachetty Madhukar、Raymond Cunningham、Thomas Hopfner、Randolph P. Thummel
DOI:10.1021/ja00056a008
日期:1993.2
The Fischer cyclization of appropriate 8-quinolinylhydrazones was employed to prepare a series of cavity-shaped hosts consisting of a central pyridine ring appended in either the 2,6- or 3,5-positions by two pyrido[3,2-g]indole subunits. The pyridine and pyridoindole moieties were further connected by dimethylene or trimethylene bridges which control the shape of the cavity. Hosts having a dimethylene