## Abstract magnified image Naphtho[2,1‐__b__]pyran nuclei are prevalent in natural products with significant biological and medicinal properties. 3,3‐Disubstituted 3__H__‐naphtho[2,1__‐b__]pyrans are photochromic and find use in electronic display systems, ophthalmic lenses, optical switches, and
New synthetic routes to spiroacetals. The 3,4-dihydro-2H-pyran approach to (�)-talaromycin B
✍ Scribed by Kocienski, Philip; Yeates, Clive
- Book ID
- 115452771
- Publisher
- Royal Society of Chemistry
- Year
- 1985
- Weight
- 574 KB
- Volume
- 0
- Category
- Article
- ISSN
- 1472-7781
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📜 SIMILAR VOLUMES
Methyl 2-(4-hydroxybutyl)-4-oxo-4~-1-benzopyran-3-carboxylate 6 1s transformed mto the sproacetals 13 and 14 (ratio 5 1) vw treatment with mdomethane&otassmm carbonate, the process mvolvmg sequenaal mtramolecular conjugate addmon and enolate alkylafion The 2,3-epoxlde 7 derived from 6 undergoes spuw
The reaction of arylmethylenema lonaldehyties I with various types of olefins afforded a series of 4-aryl-3,4-dihydro-2H-pyran-5-carboxaldehydes III. Esploring chemistry of arylnethylenemalonaldehydes I, readily accessible by the method recently developed in our Laboratory', we have ascertained a ve
## Abstract Several new benzo[__ij__]pyrano[2,3‐__b__]quinolizine‐8‐ones **5** and 4__H__‐pyrano[2,3‐__b__]pyridine **8** derivatives were synthesized from 4‐hydroxyquinolines **1**. Reacting 3‐acetyl‐4‐hydroxy‐1‐phenyl‐1__H__‐quinoline‐2‐one with dimethylformamide dimethylacetal afforded 3‐(3‐Dime