An article Magnesium Halide-Catalyzed Synthesis of Oxaspiro[2.5]octenes from a Methylenecyclopropane and Acyl Cyanoalkenes WOS:000664252100009 published article about MGI2-MEDIATED RING EXPANSIONS; OXA-MICHAEL REACTION; CYCLOADDITION; LEWIS; ALKYLIDENECYCLOPROPANES; 2-METHYLENEAZIRIDINES; HETEROCYCLES; ANNULATION in [Suzuki, Itaru; Shibata, Ikuya] Osaka Univ, Res Ctr Environm Preservat, 2-4 Yamadaoka, Suita, Osaka 5650871, Japan; [Ogura, Kazuki; Shimazu, Jun-ya; Shibata, Ikuya] Osaka Univ, Dept Appl Chem, Grad Sch Engn, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan in 2021, Cited 33. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5. Formula: C8H8O2
MgX2-catalyzed annulation of methylenecyclopropanes with acyl cyanoalkenes was accomplished to give oxaspiro[2.5]octenes in excellent yields. The reaction proceeded through a rare intramolecular oxa-Michael addition of Mg enolate. The oxaspiro ring was transformed into 4H-pyran at a higher temperature in the presence of MgX2.
Formula: C8H8O2. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Suzuki, I; Ogura, K; Shimazu, J; Shibata, I or concate me.
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