The present invention relates to a process for preparing dithioesters in which a dithiocarboxylic acid and/or a dithiocarboxylic salt is reacted with a vinyl compound and/or an alkyl compound which includes a leaving group, the reaction being carried out in a biphasic system in which one of the phases comprises water and the weight ratio of the aqueous phase to the organic phase lies in the range from 95:5 to 5:95.
The effects of 2-phthalimidooxyalkanoic acid derivatives on the germination and root-growth of cress were examined. Since 2-phthalimidooxypropionates were most effective, the optically active ethyl esters were prepared. As the result of biological testing, the (S)-(-)-isomer exhibited stronger activity than the (R)-(+)-isomer. This result is contrary to those from commercial herbicides with similar structures, phenoxy- and oxyphenoxy-propionate-type compounds, where the (R)-isomers are generally known to be the active principles.
The present disclosure provides antimicrobial compounds, compositions comprising such antimicrobial compounds, and methods of their use, in particular, antibacterial compounds and antifungal compounds. In certain aspects, the antimicrobial compounds are effective against pathogens of hospital-acquired infections. In certain aspects, the antimicrobial compounds are effective against pathogens that are resistant to antibiotics. The antimicrobial compounds can be used in antibacterial compositions, antifungal compositions, antiseptic compositions and disinfectant compositions. The antimicrobial compounds can be used as adjuncts in antibacterial compositions and antifungal compositions.
Transition metal compound, polymerization-initiator system comprising the same, and process for producing polymer
申请人:Uemura Makoto
公开号:US20070270521A1
公开(公告)日:2007-11-22
A transition metal compound represented by the formula, [(CpR
1
m
)(CO)
2
M
1
][M
2
(CO)
2
(CpR
2
n
)], wherein Cp is a cyclopentadienyl ring, R
1
and R
2
are independently of each other a hydrocarbyl group having 1 to 20 carbon atoms, and each of at least one R
1
and at least one R
2
is a hydrocarbyl group having 5 to 20 carbon atoms, m and n are independently of each other an integer of 1 to 5, and M
1
and M
2
are independently of each other a transition metal atom of the group 8 in the periodic table of elements; a polymerization-initiator system comprising said transition metal compound; and a process for producing a polymer in the presence of the polymerization-initiator system.