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New method for synthesis of 7-hydroxydibenzopyran-6-ones: Benzannulation of coumarins by three-component condensation by H. Surya Prakash Rao; M. Prabakaran; Nandurka Muthanna is a Chemistry article available to read on EtoBox.
What is New method for synthesis of 7-hydroxydibenzopyran-6-ones: Benzannulation of coumarins by three-component condensation about?
We have achieved a simple, facile and three-component synthesis of C8 and C9 alkyl/aryl C7-hydroxydibenzopyrans-6-ones involving C3-acyl coumarins, selective active methylene compounds and some methyl ketones (reagent/solvent) under basic (K2CO3) conditions. Overall, our method worked by benzannulation of the existing coumarins. In this work, we used the 2-NB group (2-NB = 2-nitrobenzyl) as a surrogate for C7–OH to engineer the construction of the ring C of the 3-hydroxydibenzopyran-6-ones. Subsequently, the photolabile 2-NB was removed under neutral conditions to reveal the C3–OH.
Who reads New method for synthesis of 7-hydroxydibenzopyran-6-ones: Benzannulation of coumarins by three-component condensation?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- H. Surya Prakash Rao; M. Prabakaran; Nandurka Muthanna
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Chemistry (Physical Sciences)
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