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