## Abstract By condensing the potassium salt of isatinic acid ‐ (__o__‐aminophenyl)‐glyoxylic acid ‐ with urea, __N__‐substituted ureas and ethyl carbamate, 2‐hydroxyquinazoline‐4‐carboxylic acid was obtained, in excellent yield. In a similar condensation with guanidine, potassium isatinate reacted
The condensations of benzaldehyde and ethyl acetoacetate with urea and thiourea
✍ Scribed by Leonard Eric Hinkel; Donald Holroyde Hey
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 389 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0165-0513
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## Abstract In Simonis reaction with ethyl acetoacetate naphthalene‐2,6‐diol gives 8‐hydroxy‐3‐methyl‐1H‐naphtho[2,1‐b]‐pyran‐1‐one and naphthalene‐2,7‐diol gives the related 9‐hydroxy isomer. In Pechman reactions, the former diol yields a coumarin, 8‐hydroxy‐1‐methyl‐3H‐naphtho[2,1‐b]‐pyran‐3‐one,