In boiling acetic anhydride o-formylphenylacetic acid is partly dehydrated to benzopyran-3-one (λmax. 441 nm.), which forms appropriate adducts with dienophiles. In sulphuric acid o-formylphenylacetic acid is completely converted into the conjugate acid of benzopyran-3-one. Experiments leading to 1-methyl-benzopyran-3-one, the more stable 1-phenyl derivative, and their conjugate acids are described.
J. M. Holland and D. W. Jones, J. Chem. Soc. C, 1970, 536 DOI: 10.1039/J39700000536
To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.
If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.
If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.
Read more about how to correctly acknowledge RSC content.
Please wait while we load your content...