Pyrazoles prepared from phosphorus ylides was written by Fusco, Raffaello;Dalla Croce, Piero. And the article was included in Chimica e l’Industria (Milan, Italy) in 1970.Related Products of 17355-75-8 The following contents are mentioned in the article:
I are prepared from RCOCH:PPh3 (II) and ArN-N:C+R1 (III). IV are also prepared Thus, 0.5 mole III in 50 ml CHCl3 are added to solutions of 0.1 mole II in 100 ml CHCl3 containing 0.15 mole Et3N and the mixtures arerefluxed 4 hr to give 79% 1,5-diphenyl-3-carbethoxypyrazole, m. 82°, and the following I (Ar = Ph) (R, R1, m.p., and % yield given): Me, CO2Me, 56°, 60; CO2Et, CO2Et, 79°, 20; OEt, CO2Et, 85°; 86; NMe2, CO2Me, 65°, 40. II are treated with III in the presence of Et3N at room temperature to give IV (Ar = p-O2NC6H4), m. 150°, and IV (Ar = o-O2NC6H4), m. 200°, which are heated with Et3N to give the following I (R = OEt, R1 = CO2Et) (Ar and m.p. given): p-O2NC6H4, 132°; o-O2NC6H4, 130°. This study involved multiple reactions and reactants, such as Ethyl 1,5-diphenyl-1H-pyrazole-3-carboxylate (cas: 17355-75-8Related Products of 17355-75-8).
Ethyl 1,5-diphenyl-1H-pyrazole-3-carboxylate (cas: 17355-75-8) belongs to pyrazole derivatives. The 1H-pyrazole provides an excellent means by which to provide the requisite hydrogen bond acceptor–donor motifs, whether as a monocyclic ring or as a fused indazole ring. Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns.Related Products of 17355-75-8
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics