2403-27-2Relevant articles and documents
Diastereoselective 1,3-dioxolane formation by photocatalytic ring opening of a-epoxyketones
Memarian, Hamid Reza,Zare, Sakineh
, p. 811 - 817 (2013)
Photocatalytic ring opening of α-epoxyketones by 2,3-dichloro-5,6- dicyano-1,4-benzoquinone (DDQ) in acetone resulted in the diastereoselective formation of 1,3-dioxolanes through Cα-O bond cleavage. The facility of the ring opening is influenced by the nature and the location of the additional substituent on the α-epoxyketones.
Pyridoimidazole derivatives as well as preparation method and application thereof
-
Paragraph 0093; 0097-0099, (2021/06/22)
The invention discloses pyridoimidazole derivatives as well as a preparation method and application thereof. The pyridoimidazole derivatives with two D-pi-A structures are synthesized on the basis that pyridoimidazole serves as an electron acceptor system by means of the electron donating property of phenanthroimidazole/diphenylamine. The pyridoimidazole derivatives can serve as photoinitiators, and the two photoinitiators both have longer conjugated chain lengths, so that the photon absorption cross section is increased, the photoinitiators can initiate polymerization reaction at the wavelength of 365 nm, have higher polymerization efficiency, and can be widely applied to the field of ultraviolet curing.
Mechanochemical Syntheses of N-Containing Heterocycles with TosMIC
Bolm, Carsten,Molitor, Claude,Rissanen, Kari,Schumacher, Christian,Smid, Sabrina,Truong, Khai-Nghi
, p. 14213 - 14222 (2021/09/07)
A mechanochemical van Leusen pyrrole synthesis with a base leads to 3,4-disubstitued pyrroles in moderate to excellent yields. The developed protocol is compatible with a range of electron-withdrawing groups and can also be applied to the synthesis of oxazoles. Attempts to mechanochemically convert the resulting pyrroles into porphyrins proved to be difficult.
Synthesis and antimicrobial evaluation of arylated 1,3,5-triphenyl pyrazoline derivatives using suzuki-miyaura reactions
Karim, Diana Khaled,Salman, Ghazwan Ali,Al-Mansury, Sadiq,Jinzeel, Nahida Abdulla
, p. 2469 - 2481 (2021/05/11)
The first palladium –catalyzed coupling reactions of 1,3,5-triphenyl pyrazoline are reported. The Suzuki-Miyaura reaction of 3-(4-bromophenyl)-1,5-diphenyl pyrazoline with one equivalent of arylboronic acids afforded 3-(biphenyl)-1,5-diphenyl pyrazoline in 53-78 % yield. While the Suzuki-Miyaura reactions of 3,5-bis(4-bromophenyl)-1-phenyl pyrazoline with two equivalent of arylboronic acids gave 3,5-bis(biphenyl)-1-phenyl pyrazoline in 55-80% yield. The characterization of the synthesized derivatives (5a-h) and (6a-h) were accomplished on the basis of NMR, FT-IR, and mass techniques. The newly pyrazoline derivatives have been investigated for their in vitro antibacterial activity against gram- negative and gram-positive bacteria. The di-coupling compounds (6a-h) exhibited promising antibacterial against all four bacterial strains compared to the mono-coupling compounds (5a-h) which displayed a slight activity. The compound 6d showed a potent activity significantly more active than Trimethoprim (100μg/ml).