A Practical Approach to 6H-Indol-6-ones Enables the Formal Synthesis of γ-Lycorane
作者:Rui Zhan、Li-Dong Shao、Yang Chen、Xin-Ting Hu、Xiao-Yan Xie、Dashan Li、Chun-Xia Zheng、You-Xi Zhang、Wen-Jing Wang
DOI:10.1055/a-1878-8597
日期:2023.1
We represented herein a two-step synthesis of 1-methyl-6H-indol-6-one which is an N-containing 6/5 fused bicyclic buildingblocks in Amaryllidaceae alkaloids. The key step featured is a ‘one-pot’ ozonolysis/reductive amination/cyclization of allylated cyclohexa-1,3-dione to give bicyclic compounds. Moreover, the formal total synthesis of naturalproduct γ-lycorane could be achieved through a photo-promoted
我们在此展示了 1-methyl-6 H -indol-6-one的两步合成,它是石蒜科生物碱中含N的 6/5 稠合双环结构单元。关键步骤是烯丙基化 cyclohexa-1,3-dione 的“一锅”臭氧分解/还原胺化/环化,得到双环化合物。此外,天然产物 γ-lycorane 的正式全合成可以通过所得双环中间体的光促进环化/氧化级联反应来实现。
A two-step practical synthesis of dehydroalanine derivatives
作者:Karell Pérez-Labrada、Edwin Flórez-López、Evelyn Paz-Morales、Luis D. Miranda、Daniel G. Rivera
DOI:10.1016/j.tetlet.2011.01.122
日期:2011.4
A two-step practical synthesis of dehydroalaninederivatives from commercially available starting materials is reported. The approach comprises an Ugi four-component reaction using 2-benzoylacetaldehyde, followed by an elimination process of the benzoate group. This protocol provided access to several dehydroalaninederivatives modified with diverse functional groups, which might be useful for further
In this study, ten ω-transaminases (ω-TAs) have been investigated to efficiently catalyze the synthesis of twenty-four functionalized benzylamines and pyridylmethylamines. We optimized the reactions, screened suitable amino donors and compared ω-transaminases activities for all aromatic aldehyde substrates. Under the optimized conditions, eighteen aromatic amines have been obtained with 60.4%–96.6%