14-Noreudesma-4,11-dien-3,9-diones′ analogues were treated with DDQ in dioxane and afforded the rearranged aromatic products. The similar compounds to eudesma-4,11-dien-3,9-diones had no reaction. 9-Actoxy-14-noreude...14-Noreudesma-4,11-dien-3,9-diones′ analogues were treated with DDQ in dioxane and afforded the rearranged aromatic products. The similar compounds to eudesma-4,11-dien-3,9-diones had no reaction. 9-Actoxy-14-noreudesma-4,11-dien-3-ones, 9-actoxy-eudesma-4,11-dien-3-ones and their analogues yielded the normal 1,2-dehydro-products. The mechanism of the rearrangement was discussed.展开更多
The enantioselective total synthesis of 12 carboxyeudesma 3,11(13) diene(1) was achieved starting from(-) dihydrocarvone in ten steps for the first time. The key steps mainly include the introduction of hydroxyl group...The enantioselective total synthesis of 12 carboxyeudesma 3,11(13) diene(1) was achieved starting from(-) dihydrocarvone in ten steps for the first time. The key steps mainly include the introduction of hydroxyl group into C 12 position of eudesmane by Vilsmeier chlorination and the generation of C3-C4 double bond into the eudesmane skeleton by elimination of halide.展开更多
The first total synthesis of Corylifolin, starting from 4\|methoxybenzaldehyde, was described. The key step is the alkylation of 4\|methoxyphenylacetaldehyde with prenyl bromide mediated by chromium(Ⅱ).
E,E) 3,7 Dimethyl 2,6 decadiene 1,10 diol(3), a terpenoid diol component of pheromonal secretion of the male queen butterfly, was synthesized stereoselectively from geraniol in seven steps. The key steps were the iodi...E,E) 3,7 Dimethyl 2,6 decadiene 1,10 diol(3), a terpenoid diol component of pheromonal secretion of the male queen butterfly, was synthesized stereoselectively from geraniol in seven steps. The key steps were the iodization rearrangement of 2,3 epoxy alcohol 6 and Claisen rearrangement of allyl vinyl ether 8.展开更多
文摘14-Noreudesma-4,11-dien-3,9-diones′ analogues were treated with DDQ in dioxane and afforded the rearranged aromatic products. The similar compounds to eudesma-4,11-dien-3,9-diones had no reaction. 9-Actoxy-14-noreudesma-4,11-dien-3-ones, 9-actoxy-eudesma-4,11-dien-3-ones and their analogues yielded the normal 1,2-dehydro-products. The mechanism of the rearrangement was discussed.
文摘The enantioselective total synthesis of 12 carboxyeudesma 3,11(13) diene(1) was achieved starting from(-) dihydrocarvone in ten steps for the first time. The key steps mainly include the introduction of hydroxyl group into C 12 position of eudesmane by Vilsmeier chlorination and the generation of C3-C4 double bond into the eudesmane skeleton by elimination of halide.
文摘The first total synthesis of Corylifolin, starting from 4\|methoxybenzaldehyde, was described. The key step is the alkylation of 4\|methoxyphenylacetaldehyde with prenyl bromide mediated by chromium(Ⅱ).
文摘E,E) 3,7 Dimethyl 2,6 decadiene 1,10 diol(3), a terpenoid diol component of pheromonal secretion of the male queen butterfly, was synthesized stereoselectively from geraniol in seven steps. The key steps were the iodization rearrangement of 2,3 epoxy alcohol 6 and Claisen rearrangement of allyl vinyl ether 8.
