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A new regioselective synthesis of 2,3,4,5-tetrahydro-6H-oxepino[3,2-c]pyran-6-ones, and [1]benzopyran-6-ones

โœ Scribed by Pierfrancesco Bravo; Massimo Frigerio; Calimero Ticozzi


Book ID
112128901
Publisher
Journal of Heterocyclic Chemistry
Year
1988
Tongue
English
Weight
209 KB
Volume
25
Category
Article
ISSN
0022-152X

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Synthesis of 2,3,4,6,7,8-Hexahydro-5H-1-
โœ Hermann Hombrecher; Paul Margaretha; Paul Tissot ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› John Wiley and Sons ๐ŸŒ German โš– 218 KB ๐Ÿ‘ 1 views

I211 Genbve 4 (5. V .86) ~ Comparative results on the reduction of 4,6,7,8-tetrahydro-7,7-dimethyl-2H-1 -benzopyran-2,5(3H)-diones 1 are reported. Hydride reduction (LiAIH, in EtzO or NaBH, in i-PrOH) affords 2,3,4,6,7,8-hexahydro-5H-l-benzopyran-5-ones 5 in 30-60 % isolated yield. Photochemical red