Highly efficient intramolecular cyclizat
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Zhen-Hua Li; Cun Zheng; Wei-Ke Su
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Article
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2008
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Journal of Heterocyclic Chemistry
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English
β 321 KB
## Abstract magnified image Highly efficient intramolecular cyclization and of 2β²βhydroxychalcones to 4βchloroβ2__H__βchromenes under Vilsmeier conditions have been developed. In comparison with the reported methods, studies carried out indicate that Vilsmeier reagent generated __in situ__ from DM