Novel Copolymers of Vinyl Acetate and Some Ring‐Substituted 2‐Phenyl‐1,1‐dicyanoethylenes

Asymmetric Organocatalytic Synthesis of Substituted Chiral 1,4-Dihydropyridine Derivatives

“…Spectral data for enamines 1b , 1c , 1d , 1e , 1f , 1g , and malononitriles 2a , 2b , 2c , 2d , 2e , 2f , 2g , 2h , 2i , 2j , are consistent with values previously reported in the literature. For the spectra and HPLC chromatograms of products 4 , see Supporting Information.…”

First Organocatalytic Asymmetric Synthesis of 1-Benzamido-1,4-Dihydropyridine Derivatives

“…Chemical shifts were reported in the δ scale relative to residual DMSO (2.50 ppm) for 1 H-NMR and to the central line of DMSO- d 6 (39.52 ppm) for 13 C-APT-NMR. Spectral data for many of the synthesized compounds are consistent with values previously reported in the literature: hydrazone 7a [ 26 ]; alkylidenemalononitriles 9a [ 27 ], 9b [ 27 ], 9c [ 28 ], 9d [ 28 ], 9e [ 27 ], 9f [ 29 ], 9g [ 30 ], 9i [ 27 ], 9j [ 27 ], 9k [ 28 ], 9l [ 31 ] and 9m [ 31 ]; and 1,4-dihydropyridines 10ac [ 19 ], 10ae [ 19 ], 10af [ 19 ] and 10ai [ 19 ]. Melting points were recorded on a Gallenkamp MDP350 Variable Heater melting point apparatus without correction.…”

Novel Copolymers of Styrene and Some Ring-substituted 2-Phenyl-1,1-dicyanoethylenes

“…Other functional group bands are 1760 cm −1 (C=O, stretching) for 4-CH 3 CO 2 ; 3365 (N-H, stretching), 1600 (C=O, stretching), 1554 (C-N in plane bending) for 4-CH 3 CONH. These bands were found also in copolymers of 2-phenyl-1,1-dicyanoethylene with vinyl acetate (15)(16)(17) and 4-fluorostyrene (18,19). 1 H-NMR spectra of the ST-TSE copolymers show a broad double peak in a 5.8-7.5 ppm region corresponding to phenyl ring protons.…”