An approach to novel fused triazole or tetrazole derivatives starting from benzimidazo[1,2‐
<i>a</i>
]quinazoline‐5(7
<i>H</i>
)‐one and 5,7‐dihydro‐5‐oxopyrido[3′,2′:5,6]pyrimido[1,2‐
<i>a</i>
]benzimidazole
作者:Antonio Da Settimo、Giampaolo Primofiore、Federico Da Settimo、Gianluca Pardi、Francesca Simorini、Anna Maria Marini
DOI:10.1002/jhet.5570390523
日期:2002.9
The synthetic potential of the title compounds benzimidazo[1,2-a]quinazoline-5(7H)-one 2a and 5,7-dihydro-5-oxopyrido[3′,2′:5,6]pyrimido[1,2-a]benzimidazole 2b for the construction of novel polyhetero-cyclic frameworks is reported. Compounds 2a,b, by conversion into their thio analogues 3a,b, were used for the synthesis of tetrazole (5a,b) and triazole (7a,b) derivatives, as well as for an unexpected
标题化合物苯并咪唑并[1,2- a ]喹唑啉-5(7 H)-one 2a和5,7-二氢-5-氧代吡啶并[3',2':5,6]嘧啶[1,据报道2- a ]苯并咪唑2b用于构建新型多杂环框架。通过转化为硫代类似物3a,b的化合物2a,b用于合成四唑(5a,b)和三唑(7a,b)衍生物,以及意外地合成三唑8a,b,是由于Dimroth重排的出现而导致的7a,b的异构体。