## Abstract 2‐Aryl‐2,3‐dihydro‐4__H__‐pyran‐4‐ones were prepared in one step by cyclocondensation of 1,3‐diketone dianions with aldehydes. The use of HCl (10%) for the aqueous workup proved to be very important to avoid elimination reactions of the 5‐aryl‐5‐hydroxy 1,3‐diones formed as intermediate
Synthesis of 3-aryl-4, 5-dihydro-5-hydroxy-1,2-oxazoles by reaction of substituted benzonitrile oxides with the enolate ion of acetaldehyde
✍ Scribed by L. Di Nunno; L. Di Nunno; A. Scilimati
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- French
- Weight
- 478 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0040-4020
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## Abstract A convenient method for the synthesis of a novel series of 11, specifically substituted, noncondensed 5,5‐bicycles 2‐[3‐phenyl‐5‐hydroxy‐5‐trichloromethyl‐4,5‐dihydro‐1H‐pyrazol‐1‐yl]‐4‐aryl‐5‐alkylthiazoles (**3a–k**; 65–94% yield) from the reactions of 3‐phenyl‐5‐hydroxy‐5‐trichlorome
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