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
✦ LIBER ✦
4-Chlorooctahydro-2H-1-benzopyrans and 4-chloro-4a,5,6,7,8,8a-hexahydro-2H-1-benzopyrans via the Lewis acid promoted cyclization of acetals derived from trans-2-vinylcyclohexanol and trans-2-ethynylcyclohexanol: synthesis, structure, and mechanism
✍ Scribed by Melany, Michelle L.; Lock, George A.; Thompson, David W.
- Book ID
- 126046840
- Publisher
- American Chemical Society
- Year
- 1985
- Tongue
- English
- Weight
- 443 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0022-3263
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