Abstract
The condensation of substituted o-methoxybenzaldehydes or o-hydroxybenzaldehydes with a resin-bound cyclic malonic ester 3 afforded the resin 4 without catalyst. Cyclisation of the resin 4 in sulfuric acid formed 3-carboxycoumarins in good yield and excellent purity.
Original language | English (US) |
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Pages (from-to) | 354-355 |
Number of pages | 2 |
Journal | Journal of Chemical Research - Part S |
Issue number | 6 |
DOIs | |
State | Published - Jun 1 2003 |
Externally published | Yes |
Keywords
- 3-carboxycoumarins
- O-methoxybenzaldehydes or o-hydroxybenzaldehydes
- Resin-bound cyclic malonic acid ester