An article An unusual formal migrative cycloaddition of aurone-derived azadienes: synthesis of benzofuran-fused nitrogen heterocycles WOS:000649670100001 published article about DIELS-ALDER REACTION; REACTION DISCOVERY; SILOXY ALKYNES; ANNULATION; CONSTRUCTION; 1,2-DIAZINES; BENZANNULATION; DERIVATIVES; LACTONES; ACCESS in [Feng, Qiang; Wu, An; Sun, Jianwei] Hong Kong Univ Sci & Technol, Shenzhen Res Inst, Dept Chem, Kowloon, Clear Water Bay, Hong Kong, Peoples R China; [Zhang, Xinhao] Peking Univ Shenzhen Grad Sch, Shenzhen Bay Lab, State Key Lab Chem Oncogenom, Shenzhen, Peoples R China; [Song, Lijuan] Harbin Inst Technol Shenzhen, Sch Sci, Shenzhen 518055, Peoples R China; [Sun, Jianwei] Hong Kong Branch Chinese Natl Engn Res Ctr Tissue, Kowloon, Clear Water Bay, Hong Kong, Peoples R China in 2021.0, Cited 46.0. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5. Formula: C8H8O2
Aurone-derived azadienes are well-known four-atom synthons for direct [4 + n] cycloadditions owing to their s-cis conformation as well as the thermodynamically favored aromatization nature of these processes. However, distinct from this common reactivity, herein we report an unusual formal migrative annulation with siloxy alkynes initiated by [2 + 2] cycloaddition. Unexpectedly, this process generates benzofuran-fused nitrogen heterocyclic products with formal substituent migration. This observation is rationalized by less common [2 + 2] cycloaddition followed by 4 pi and 6 pi electrocyclic events. DFT calculations provided support to the proposed mechanism.
Formula: C8H8O2. Welcome to talk about 123-11-5, If you have any questions, you can contact Feng, Q; Wu, A; Zhang, XH; Song, LJ; Sun, JW or send Email.
Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles