Journal
NEW JOURNAL OF CHEMISTRY
Volume 43, Issue 36, Pages 14459-14474Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nj03533h
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Funding
- SERB, New Delhi [CRG/2018/001897]
- CSIR-New Delhi (XIIth FYP Project 'THUNDER' Grant) [BSC0102]
- ICMR
- CSIR
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The aerobic oxidative cleavage of Passerini and Ugi adducts in the presence of base and copper(i) iodide is studied in detail. The oxidative cleavage yields alpha-ketoamides along with acids and amides from Passerini and Ugi adducts respectively. Mechanistic investigations revealed that the reaction proceeds via a radical pathway involving molecular oxygen. Control experiments with O-18-labeled Passerini adducts confirmed that molecular oxygen is the source of oxygen in alpha-ketoamides. A variety of Passerini and Ugi adducts were studied to explore the effect of substitution. Overall, the present study provides an insight into the reactivity of Passerini and Ugi adducts in strong basic conditions along with a method to prepare alpha-ketoamides.
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