《Chiral calcium catalysts with neutral coordinative ligands: enantioselective 1,4-addition reactions of 1,3-dicarbonyl compounds to nitroalkenes》 was written by Tsubogo, Tetsu; Yamashita, Yasuhiro; Kobayashi, Shu. Name: 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine And the article was included in Angewandte Chemie, International Edition in 2009. The article conveys some information:
The asym. 1,4-addition reaction of 1,3-dicarbonyl compounds to nitroalkenes was studied. Under catalytic amount of calcium salt in presence of chiral ligands, 2-substituted 1,3-dicarbonyl compounds were obtained in good yields and stereoselectivities. In the part of experimental materials, we found many familiar compounds, such as 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7Name: 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine)
2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Name: 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine Pyridine has a conjugated system of six π electrons that are delocalized over the ring.