Studies on the Dehydrogenation of 9-Oxygenated-eudesma-4-en-3-ones with DDQ
摘要:
9-Acetoxy-eudesma-4,11-dien-3-ones (4a, 4b) and 9-acetoxy-14-noreudesma-4,11-dien-3-ones (5a, 5b) were treated with DDQ in dioxane to yield normal 1,2-dehydro-products, whereas 14-noreudesma-4,11-dien-3,9-diones (2a, 2b) afforded a rearranged aromatic product, 1-hydroxy-15-noreudesma-1, 3, 5 (10), 11-tetraen-9-one (3). No reaction was observed by treatment of eudesma-4,11-dien-3,9-diones (1a, 1b) with DDQ under the same conditions. The effect of 10-methyl configuration on this reaction is also discussed.
Studies on the Dehydrogenation of 9-Oxygenated-eudesma-4-en-3-ones with DDQ
摘要:
9-Acetoxy-eudesma-4,11-dien-3-ones (4a, 4b) and 9-acetoxy-14-noreudesma-4,11-dien-3-ones (5a, 5b) were treated with DDQ in dioxane to yield normal 1,2-dehydro-products, whereas 14-noreudesma-4,11-dien-3,9-diones (2a, 2b) afforded a rearranged aromatic product, 1-hydroxy-15-noreudesma-1, 3, 5 (10), 11-tetraen-9-one (3). No reaction was observed by treatment of eudesma-4,11-dien-3,9-diones (1a, 1b) with DDQ under the same conditions. The effect of 10-methyl configuration on this reaction is also discussed.
The Enantioselective Synthesis of (+)-Selina-3, 11-Dien-9-ol
作者:Jiong Yang、Zhaoming Xiong、Yonggang Chen、Yulin Li
DOI:10.1080/00397919708005005
日期:1997.9
The title compound 1 was enantioselectively synthesized from oxycarvone in nine steps with an overall yield of 15%. The key step involves the p-toluenesulfonhydrazide assisted diastereoselective reductive rearrangement of allylic alcohol.