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
Crystal Structure of 5,7-Dimethoxy-8-(2-oxo-3-methylbutyl)-2 H-1-benzopyran-2-one (Isosibiricin)
โ Scribed by Attar Singh; Vivek K. Gupta; Rajnikant; Prof. K. N. Goswami
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 258 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0232-1300
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
## Abstract A detailed investigation of the reaction of hippuric acid (2) with dimedone (1) and triethyl orthoformate or other oneโcarbon sources in acetic anhydride yielding the benzopyran derivative 3 and many byproducts is described. An explanation of this complex process, several attempts to op
## Abstract The benzazepinโ2โones **7** and **9** were prepared from homoveratroyl chloride **(4)** and phenacylamine. Compounds **7** and **9** were used for the preparation of the benzazepinโ2โamines **3, 11, 13** and **14.** A synthesis of the benzazepineโ1,2โdione **17** and the benzazepineโ2,4