2-氯噻唑-5-羧酸乙酯和苯之间的光化学反应没有产生产物。相反,与2-碘噻唑-5-羧酸乙酯的反应得到3-苯基异噻唑-4-羧酸乙酯。如果反应在呋喃、噻吩和 2-溴噻吩的存在下进行,则观察到相同的行为。研究了由此获得的产物的光物理性质,发现 3-苯基异噻唑-4-羧酸乙酯的观察吸收 [λ max =257 nm (e = 7000 M -1 cm -1 ),278 nm (e = 7000 M -1 cm -1 ) 对于 3-(2-furyl)isothiazole-4-carboxylate 乙酯,269 和 285 nm (e = 7500 M -1 cm -1 ) 对于 3-(2-thienyl)isothiazole-4 乙酯-羧酸盐]主要是由于从 HOMO 到 LUMO+1 轨道的 π→π* 跃迁。测试化合物显示荧光 [λ em = 350-400 (λ exc = 300 nm), 360
[Objective] An objective of the present invention is to provide compounds that are effective against various resistant bacteria which cause current clinical problems, for example, pneumococci including penicillin resistant
Streptococcus pneumoneae
(PRSP),
Haemophilus influenzae
including bata-lactamase-nonproducing ampicillin-resistant
Haemophilus influenzae
(BLNAR), and
Moraxella
(
Branhamella
)
catarrhalis.
[Structure] The present invention provides 2-ethenylthio-based carbapenem derivatives represented by the formula (I) or pharmaceutically acceptable salts thereof that are effective, for example, against pneumococci including penicillin resistant
Streptococcus
pneumoneae (PRSP),
Haemophilus influenzae
including beta-lactamase-nonproducing ampicillin-resistant
Haemophilus influenzae
(BLNAR), and
Moraxella
(Branhamella) catarrhalis:
In this joint theoretical and experimental work, we investigate the properties of Mag-fura-2 and seven structurally related fluorescent sensors designed for the ratiometric detection of Mg2+ cations. The synthesis of three new compounds is described, and the absorption and emission spectra of all of the sensors in both their free and metal-bound forms are reported. A time-dependent density functional
2-Ethenylthio-type carbapenem derivatives of formula (I) or pharmaceutically acceptable salts thereof are provided. The compounds according to the present invention have potent antimicrobial activity and a wide antimicrobial spectrum against pneumococci including penicillin resistant
Streptococcus pneumoniae
(PRSP),
Haemophilus influenzae
including β-lactamase-negative, ampicillin-resistant
Haemophilus influenzae
(BLNAR), and
Moraxella
(
Branhamella
)
catarrhalis
.
2-Ethenylthio-type carbapenem derivatives of formula (I) or pharmaceutically acceptable salts thereof are provided. The compounds according to the present invention have potent antimicrobial activity and a wide antimicrobial spectrum against pneumococci including penicillin resistant Streptococcus pneumoniae (PRSP), Haemophilus influenzae including β-lactamase-negative, ampicillin-resistant Haemophilus influenzae (BLNAR), and Moraxella (Branhamella) catarrhalis.