Abstract
In the presence of K2CO3, 2-hydroxyethyltripheny phosphonium bromide (1) reacts with substituted salicylaldehyde (2) and 2-hydroxy-1 naphthaldehyde (4) at 110 °C in a sealed tube. The title compounds were prepared in medium yield. The ratio of bromide (1) to aldehyde derivatives was also discussed in this paper.
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This work was partially supported by the National Natural Science Foundation of China
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Cao, W., Zhang, P., Chen, M. et al. A simple approach to the synthesis of 2H-1-benzopyrans and 3H-naphtho[2,1-b] pyran via intramolecular wittig reactiont. J. of Shanghai Univ. 1, 83–86 (1997). https://doi.org/10.1007/s11741-997-0050-0
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DOI: https://doi.org/10.1007/s11741-997-0050-0