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A General Synthetic Route to 6,6-Substituted-6H-dibenzo[b,d]pyrans from Dibenzofuran.

✍ Scribed by Bin Wang; Minxiong Li; Shansheng Xu; Haibin Song; Baiquan Wang


Publisher
John Wiley and Sons
Year
2007
Weight
22 KB
Volume
38
Category
Article
ISSN
0931-7597

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## Abstract Several new benzo[__ij__]pyrano[2,3‐__b__]quinolizine‐8‐ones **5** and 4__H__‐pyrano[2,3‐__b__]pyridine **8** derivatives were synthesized from 4‐hydroxyquinolines **1**. Reacting 3‐acetyl‐4‐hydroxy‐1‐phenyl‐1__H__‐quinoline‐2‐one with dimethylformamide dimethylacetal afforded 3‐(3‐Dime