Occupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.
来源:Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
A method was developed to analyze rat tissue, fat and blood for some chlorinated compounds found in an extract of soil from an industrial waste site. Extraction with hexane and ethyl ether-hexane (1 + 1) was followed by concentration over steam, and gas chromatographic analysis with an electron capture detector. Volatile compounds were analyzed in a glass column coated with 6% SP-2100 plus 4% OV-ll on Chromosorb W. Semivolatile compounds, chlorinated compounds and pesticides were analyzed in a 70 m glass capillary column coated with 5 OV-101. Phenols were analyzed in a glass column packed with 1% SP-1240 DA on Supelcoport. The most efficient means of separation was to use the same glass column for volatile compounds, a DB-5 fused silica capillary column for semivolatile compounds, pesticides and phenols, and the same 1% SP-1240 DA glass column for separation of beta-BHC and pentachlorophenol. Recoveries ranged from 86.3 + or - 9.1% (mean + or - SD) to 105 + or - 10.4%. Sensitivities for semivolatile chlorinated compounds, pesticides and phenols were 4 ng/g for fat, 1 ng/g for tissue and 0.2 ng/ml for blood. Sensitivities for volatile compounds were 4-fold higher (16, 4 and 0.8, respectively). Sensitivities for dichlorobenzenes and dichlorotoluenes were 8 ng/g for fat, 2 ng/g for tissue and 0.4 ng/ml for blood.
Oxidative Chlorination, Desulphonation, or Decarboxylation To Synthesize Pharmaceutical Intermediates: 2,6-Dichlorotoluene, 2,6-Dichloroaniline, and 2,6-Dichlorophenol
Nine 1,3-dichlorobenzene congeners were selected as model compds. to assess the relative rates of proton abstraction from 4- and 5-positions ("ortho" vs. "meta" metalation). Using lithium 2,2,6,6-tetramethylpiperidide as the basic reagent, the chlorine-adjacent 4-position underwent metalation exclusively. In contrast, attack at the chlorine-remote 5-position became significant even in the case of moderately
COMPOSITIONS AND METHODS FOR TREATING NEURODEGENERATIVE DISEASE
申请人:COGNITION THERAPEUTICS, INC.
公开号:US20170197977A9
公开(公告)日:2017-07-13
This invention relates to novel diarylamino compounds that bind to the sigma-2 receptor, to pharmaceutical compositions comprising such compounds, and to methods for inhibiting or restoring synapse loss in neuronal cells, modulating a membrane trafficking change in neuronal cells, and treating cognitive decline and neurodegenerative diseases and disorders therewith.
The invention provides compounds of Formula I, stereoisomers or pharmaceutically acceptable salts thereof, wherein A, B, D, R
1
, R
2
, R
4
and R
5
are defined herein, a pharmaceutical composition that includes a compound of Formula I and methods of use thereof
Sodiummethoxide reacts with dichlorobenzenes in HMPA to give the chloroanisoles as a result of a SNAr process. Excess MeONa then effects the demethylation of the ethers to give the chlorophenols via an SN2 reaction. With tri- and tetrachlorobenzenes the initially formed chloroanisoles can be dealkylated to chlorophenols or can suffer further substitution to give the chlorodimethoxybenzenes; these
由于S N Ar过程,甲醇钠与HMPA中的二氯苯反应生成氯茴香醚。然后过量的MeONa通过S N 2反应使醚脱甲基,得到氯酚。用三氯苯和四氯苯可以将最初形成的氯茴香醚脱烷基化为氯酚,或者可以进一步取代生成氯二甲氧基苯;它们与过量的MeONa反应,得到氯甲氧基苯酚。在取代基的电子效应的基础上,介绍并讨论了用二,三和四氯苯的各种异构体获得的结果。
Substituted triazole derivatives as oxytocin antagonists
申请人:Brown Daniel Alan
公开号:US20060160786A1
公开(公告)日:2006-07-20
The present invention relates to substituted triazoles of formula (I), uses thereof, processes for the preparation thereof and compositions containing said compounds. These inhibitors have utility in a variety of therapeutic areas including sexual dysfunction.