Soybean plants were root-treated with propham-(14)C. Analyses of metabolites indicated...glycosides of 2-hydroxypropham and...one...was probably beta-o-glucoside...
After dosing goat and chicken with labeled propham, analyses...showed presence of para-sulfate derivatives in goat milk and goat carcasses. Glucuronide was also found in chicken carcass... .
Propham is a cholinesterase or acetylcholinesterase (AChE) inhibitor. Carbamates form unstable complexes with chlolinesterases by carbamoylation of the active sites of the enzymes. This inhibition is reversible. A cholinesterase inhibitor suppresses the action of acetylcholine esterase. Because of its essential function, chemicals that interfere with the action of acetylcholine esterase are potent neurotoxins, causing excessive salivation and eye-watering in low doses. Headache, salivation, nausea, vomiting, abdominal pain and diarrhea are often prominent at higher levels of exposure. Acetylcholine esterase breaks down the neurotransmitter acetylcholine, which is released at nerve and muscle junctions, in order to allow the muscle or organ to relax. The result of acetylcholine esterase inhibition is that acetylcholine builds up and continues to act so that any nerve impulses are continually transmitted and muscle contractions do not stop.
来源:Toxin and Toxin Target Database (T3DB)
毒理性
致癌性证据
没有关于人类的数据。动物致癌性证据不足。总体评估:第3组:该物质对人类致癌性无法分类。
No data are available in humans. Inadequate evidence of carcinogenicity in animals. OVERALL EVALUATION: Group 3: The agent is not classifiable as to its carcinogenicity to humans.
After oral or ip administration of propham to rats, 80% of (14)C-isopropyl label appeared in urine within 4 days. Smaller amount appeared in feces and respired air.
...Herbicide-related material was distributed throughout the body /of treated rats/, with highest concentration in the kidneys. ...Approximately 30% of iv dose of propham was excreted in 6 hr bile.
Propham is absorbed through coleoptiles of emerging grass seedlings and to lesser degree through roots of plants. ...Absorbed slowly through leaves... propham or its metabolites are readily transported acropetally following root absorption.
The tissue distribution and excretion of 14C-labelled propham (purity >99%, specific activity of chain-labelled molecule 4.9 mCi/mmol and of ring-labelled molecule 4.1 mCi/mmol) were investigated in adult female Wistar rats (mean body-weight 270 g). A single oral dose (2 animals per dose) of 0, 0.67, 19, 38, or 75 mg/kg bw 14C-labelled propham (5 uCi in 1.0 mL of 20% aqueous ethanol solution) was administered by intubation. Rats were housed individually in glass metabolism cages; expired air was continuously monitored for radioactivity for 72 hr. The feces and urine samples were collected at 24, 48, and 72 hr and analyzed for 14C by liquid scintillation counting. The urine was analyzed by paper chromatography and thin-layer chromatography. In a similar experiment, single rats were killed at various times (1-24 hr) after administration of a single dose of 0.81 mg/kg bw 14C-labelled propham/kg bw (5 uCi in 1.0 mL of a 20% aqueous ethanol solution). Tissue samples (kidneys, liver, blood, lungs, heart, spleen, intestine, brain, muscle, and fat) were freeze-dried, and analyzed for 14C... . The average 3-day excretion of radioactivity in urine, feces, and CO2 was 80, 5, and 5%, respectively after chain-labelling of propham, and 85, 5, and 0%, respectively after ring-labelling of propham. There was no significant difference in the rate of excretion or the route of elimination among rats receiving different dosages. The radioactivity was distributed in all examined tissues with the highest concentrations in the kidneys.
1.周国泰,化学危险品安全技术全书,化学工业出版社,1997 2.国家环保局有毒化学品管理办公室、北京化工研究院合编,化学品毒性法规环境数据手册,中国环境科学出版社.1992 3.Canadian Centre for Occupational Health and Safety,CHEMINFO Database.1998 4.Canadian Centre for Occupational Health and Safety, RTECS Database, 1989
Clay-Catalyzed Nitration of a Carbamate Fungicide Diethofencarb
摘要:
The unique nitration of the carbamate fungicide diethofencarb (Powmyl, isopropyl 3,4-diethoxycarbanilate) was examined in 14 Japanese soils and three types of clays under the aerobic conditions using the C-14-labeled compound. Nitration at the 6-position of the 3,4-diethoxyphenyl ring was a clay-catalyzed reaction and extremely enhanced under the dry conditions. Kinetic and product analysis on nitration of nine C-14-labeled carbamate analogues in the kaolinite thin layer showed the nitration proceeding electrophilically. Requirement of molecular oxygen and retardation of nitration by radical scavengers and spin-trap reagents together with semiempirical AM1 molecular orbital calculations strongly suggested contribution of a radical mechanism, and these different speculations on the reaction mechanism might originate from the heterogeneous reaction environment on clay.
Enantioselective Homogeneous Hydrogenation of Monosubstituted Pyridines and Furans
摘要:
The first case of an enantioselective hydrogenation of monosubstituted pyridines and furans with homogeneous rhodium diphosphine catalysts with low but significant enantioselectivities and catalyst activities is reported. Best enantioselectivities (ees of 24-27%) were obtained for the hydrogenation of 2- and S-pyridine carboxylic acid ethyl ester and 2-furan carboxylic acid with catalysts prepared in situ from [Rh(nbd)(2)]BF4 and the chiral ligands diop, binap, or ferrocenyl diphosphines of the josiphos type. Turnover numbers (ton) were in the order of 10-20, turnover frequencies (tof) usually 1-2 h(-1). Diphosphines giving 6- or 7-ring chelates led to higher ees than 1,2-diphosphines; otherwise, no clear correlation between ligand properties and catalytic performance was found. In some experiments black precipitates were observed at the end of-the reaction, indicating the decomposition of the homogeneous catalysts for certain ligand/metal/ substrate combinations.
[EN] 3-[(HYDRAZONO)METHYL]-N-(TETRAZOL-5-YL)-BENZAMIDE AND 3-[(HYDRAZONO)METHYL]-N-(1,3,4-OXADIAZOL-2-YL)-BENZAMIDE DERIVATIVES AS HERBICIDES<br/>[FR] DÉRIVÉS DE 3-[(HYDRAZONO))MÉTHYL]-N-(TÉTRAZOL-5-YL)-BENZAMIDE ET DE 3-[(HYDRAZONO)MÉTHYL]-N-(1,3,4-OXADIAZOL-2-YL)-BENZAMIDE UTILISÉS EN TANT QU'HERBICIDES
申请人:SYNGENTA CROP PROTECTION AG
公开号:WO2021013969A1
公开(公告)日:2021-01-28
The present invention related to compounds of Formula (I): or an agronomically acceptable salt thereof, wherein Q, R2, R3, R4, R5 and R6 are as described herein. The invention further relates to compositions comprising said compounds, to methods of controlling weeds using said compositions, and to the use of compounds of Formula (I) as a herbicide.
[EN] HERBICIDALLY ACTIVE HETEROARYL-S?BSTIT?TED CYCLIC DIONES OR DERIVATIVES THEREOF<br/>[FR] DIONES CYCLIQUES SUBSTITUÉES PAR HÉTÉROARYLE À ACTIVITÉ HERBICIDE OU DÉRIVÉS DE CELLES-CI
申请人:SYNGENTA LTD
公开号:WO2011012862A1
公开(公告)日:2011-02-03
The invention relates to a compound of formula (I), which is suitable for use as a herbicide wherein G is hydrogen or an agriculturally acceptable metal, sulfonium, ammonium or latentiating group; Q is a unsubstituted or substituted C3-C8 saturated or mono-unsaturated heterocyclyl containing at least one heteroatom selected from O, N and S, or Q is heteroaryl or substituted heteroaryl; m is 1, 2 or 3; and Het is an optionally substituted monocyclic or bicyclic heteroaromatic ring; and wherein the compound is optionally an agronomically acceptable salt thereof.
Molecules having pesticidal utility, and intermediates, compositions, and processes, related thereto
申请人:Dow AgroSciences LLC
公开号:US20180279612A1
公开(公告)日:2018-10-04
This disclosure relates to the field of molecules having pesticidal utility against pests in Phyla Arthropoda, Mollusca, and Nematoda, processes to produce such molecules, intermediates used in such processes, pesticidal compositions containing such molecules, and processes of using such pesticidal compositions against such pests. These pesticidal compositions may be used, for example, as acaricides, insecticides, miticides, molluscicides, and nematicides. This document discloses molecules having the following formula (“Formula One”).
Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/Schiff base/Pd complex as an efficient heterogeneous and recyclable nanocatalyst for chemoselective N-arylation of O-alkyl primary carbamates
作者:A. R. Sardarian、M. Zangiabadi、I. Dindarloo Inaloo
DOI:10.1039/c6ra17268g
日期:——
An Fe3O4@SiO2/Schiff base/Pd complex as an efficient, heterogeneous magnetically recoverable and reusable catalyst for the N-arylation of O-alkyl primary carbamates.