Photolysis of Triarylmethylphosphonic Acids and Their Esters
作者:Min Shi、Yoshiki Okamoto、Setsuo Takamuku
DOI:10.1246/bcsj.63.453
日期:1990.2
Upon UV-irradiation in an alkaline alcohol solution, some triarylmethylphosphonic acids underwent C–P bond cleavage to give triarylmethanes and alkyl dihydrogenphosphates, while, in an acidic or a neutral alcohol solution, they afforded biaryls. Their dimethyl esters gave also biaryls and dimethyl [alkoxy(aryl)methyl]phosphonates, which were derived from the insertion of (dialkoxyphosphinyl)arylcarbenes
Process for the preparation of substituted pyrrolidine neuraminidase inhibitors
申请人:——
公开号:US20030055297A1
公开(公告)日:2003-03-20
A process for the preparation of neuraminidase inhibitors having structural formula (28)
1
or therapeutically acceptable salts thereof, in which R
1
is alkyl, cycloalkyl, cycloalkylalkyl, or arylalkyl; R
2
is alkyl, cycloalkyl, cycloalkylalkyl, or arylalkyl; R
4
is alkyl, cycloalkyalkyl, or aryl-(C
2
-C
4
-alkyl); R
10
is methyl, ethyl, iso-propyl, or vinyl; and
R
12
is hydrogen or alkyl and intermediates useful for the process are disclosed.
Influence of Some Novel N-Substituted Azoles and Pyridines on Rat Hepatic CYP3A Activity
作者:James T. Slama、Julie L. Hancock、Taikyun Rho、Lidia Sambucetti、Kenneth A. Bachmann
DOI:10.1016/s0006-2952(98)00096-3
日期:1998.6
A series of N-substituted heteroaromatic compounds structurally related to clotrimazole was synthesized, and the effects of these compounds on ethosuximide clearance in rats were determined as a measure of their abilities to induce cytochrome P4503A (CYP3A) activity. Ethosuximide clearance and in vitro erythromycin N-demethylase activity were shown to correlate. In this series, imidazole or other related
This process is a process for production of a vinyl chloride polymer by suspension polymerization or emulsion polymerization of vinyl chloride monomer or a mixture of vinyl chloride monomer with a vinyl monomer copolymerizable with said vinyl chloride monomer in an aqueous medium, characterized in that the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated π bonds, while controlling the chloride ion concentration in the reaction mixture to not higher than 100 ppm. According to said process, scaling onto the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.
The isoxazole derivatives having the following general formula:
[wherein R1 represents an optionally substituted aryl group or aromatic heterocyclic group; R2 represents a hydrogen atom, a halogen atom, an optionally substituted alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group, an alkoxy group, a cyano group, a carboxyl group, an alkanoyl group, an alkoxycarbonyl group or an optionally substituted carbamoyl group; R3 represents an optionally substituted amino group or a saturated heterocyclic group; X represents an oxygen atom or a sulfur atom; n is an integer of from 2 to 6] has an excellent monoamine oxidase inhibitory activity, and is useful as a therapeutic agent or a preventive agent against nervous diseases such as depression.