Barkov, Alexey Yu. published the artcileHighly regio- and stereoselective 1,3-dipolar cycloaddition of stabilised azomethine ylides to 3,3,3-trihalogeno-1-nitropropenes: synthesis of trihalomethylated spiro[indoline-3,2′-pyrrolidin]-2-ones and spiro[indoline-3,3′-pyrrolizin]-2-ones, COA of Formula: C10H11NO4, the publication is Tetrahedron (2016), 72(43), 6825-6836, database is CAplus.
Reactions of 3,3,3-trihalogen-1-nitropropenes with N-alkyl-¦Á-amino acids (sarcosine, proline) and isatins proceed regio- and diastereoselectively to give a wide range of trihalomethylated spiro[indoline-3,2′-pyrrolidin]-2-ones I (R1 = H, 5,7-(Br)2; R = H, CH3, C5H11, Bn; X = F, Br, Cl) and spiro[indoline-3,3′-pyrrolizin]-2-ones II (R1 = H, 5-NO2, 5,7-(Br)2; R = H, CH3, C5H11, Bn; X = F, Br, Cl) in good yields as a result of a 1,3-dipolar cycloaddition of the intermediate stabilized azomethine ylide at the double bond of the nitroalkenes.
Tetrahedron published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C10H11NO4, COA of Formula: C10H11NO4.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia