Suzuki, Itaru; Ogura, Kazuki; Shimazu, Jun-ya; Shibata, Ikuya published the artcile< Magnesium Halide-Catalyzed Synthesis of Oxaspiro[2.5]octenes from a Methylenecyclopropane and Acyl Cyanoalkenes>, COA of Formula: C9H6ClNO, the main research area is oxaspirooctene preparation diastereoselective chemoselective; methylenecyclopropane acyl cyanoalkene cyclization magnesium halide catalyst.
MgX2-catalyzed annulation of 1,1-di-Et 2-methylidenecyclopropane-1,1-dicarboxylate with acyl cyanoalkenes RC(O)C(CN)=CHAr (R = Me, Ph, 3-chlorophenyl, etc.; Ar = 4-fluorophenyl, 1-naphthyl, 2-furyl, etc.) was accomplished to give oxaspiro[2.5]octenes I (E = C(O)OEt) and II in excellent yields. The reaction proceeded through a rare intramol. oxa-Michael addition of Mg enolate. The oxaspiro ring was transformed into di-Et 2-((5-cyano-4,6-diphenyl-4H-pyran-2-yl)methyl)malonate at a higher temperature in the presence of MgX2.
European Journal of Organic Chemistry published new progress about Chemoselectivity. 21667-62-9 belongs to class nitriles-buliding-blocks, and the molecular formula is C9H6ClNO, COA of Formula: C9H6ClNO.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts