๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Access to 3,5,6,7-tetrahydro-2H-[1]benzopyran ring system from 2,3,5,6,7,8-hexahydrobenzo-4H-pyran-4-one derivatives

โœ Scribed by Dolmazon, Rene; Gelin, Suzanne

Book ID
126200956
Publisher
American Chemical Society
Year
1984
Tongue
English
Weight
413 KB
Volume
49
Category
Article
ISSN
0022-3263

No coin nor oath required. For personal study only.

๐Ÿ“œ SIMILAR VOLUMES

Synthesis of 2,3,4,6,7,8-Hexahydro-5H-1-
Synthesis of 2,3,4,6,7,8-Hexahydro-5H-1-benzopyran-5-ones and 3-(6-Oxo-1-cyclohexenyl)alkanoic Acids by Reduction of 4,6,7,8-Tetrahydro-2H-1-benzopyran-2,5(3H)-diones
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

9-(4-Bromophenyl)-3,3,6,6-tetramethyl-3,
9-(4-Bromophenyl)-3,3,6,6-tetramethyl-3,4,6,7-tetrahydro-2H-xanthene-1,8(5H,9H)-dione
โœ Bigdeli, M. Ali ;Mahdavinia, Gholam Hossein ;Amani, Vahid ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› International Union of Crystallography ๐ŸŒ English โš– 646 KB

The title compound, C 23 H 25 BrO 3 , was synthesized by the reaction of p-bromobenzaldehyde with dimedone and HClO 4 / SiO 2 in EtOH. In the molecule, the dihydropyran ring adopts a boat conformation and the two cyclohexene rings are in a trans conformation.