Pilgram, Kurt H., Phosphorus and Sulfur and the Related Elements, 1988, vol. 36, p. 139 - 146
摘要:
DOI:
作为产物:
描述:
光气 、 1-甲基环丙烷碳酰肼 在
ether-hexane 作用下,
以
乙酸乙酯 为溶剂,
反应 2.0h,
以to give 56.0 g (85%) of product as a white crystalline solid的产率得到5-(1-甲基环丙基)-3H-1,3,4-恶二唑-2-酮
5-Substituted-3-(substituted)phenyl-1,3,4-oxadiazolin-2(3<i>H</i>)-ones. Synthesis and reactions with nucleophilic reagents
作者:Kurt H. Pilgram
DOI:10.1002/jhet.5570190423
日期:1982.7
A new synthesis of 4,4-dialkyl-2-(substituted)phenylsemicarbazides has been developed. The procedure begins with a 5-substituted-3-(substituted)phenyl-1,3,4-oxadiazolin-2(3H)-one, 3, which is treated with dialkylamine to give a 1-acyl-4,4-dialkyl-2-(substituted)phenylsemicarbazide, 7. Subsequent base-catalyzed hydrolysis of 7 gives 4,4-dialkyl-2-(substituted)phenylsemicarbazides, 14, in high yield
New herbicidally active compounds have the formula ##STR1## wherein R.sup.1 is H, alkyl, alkenyl, cycloalkyl, R.sup.2 is CF.sub.3, NO.sub.2, CN, halogen, alkyl, alkoxy or alkyl, and --X--Y--Z-- is ##STR2## in which R.sup.3 is H, or alkyl, R.sup.4 is H, alkyl or cycloalkyl, R.sup.5 is H or alkyl or when --Y--Z-- contains two vicinal R.sup.4 groups then these R.sup.4 groups taken together with the ring carbon atoms to which they are attached form a saturated or unsaturated hydrocarbyl ring containing 5 or 6 carbon atoms.
Heterocyclic-substituted anilide derivatives, a process for their preparation, herbicidal compositions containing them and a method of controlling undesired plant growth using them
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0003619A2
公开(公告)日:1979-08-22
Novel compounds are provided of the general formula
wherein RI represents a hydrogen atom, an optionally substituted cycloalkyl group having 3 to 5 ring carbon atoms and a total of 3 to 6 carbon atoms, or an alkyl group having 1 to 4 carbon atoms or an alkenyl group having 2 or 3 carbon atoms which groups may be unsubstituted or substituted by one or more fluorine, chlorine and/or bromine atoms; R2 represents a fluorine, chlorine or bromine atom, a trifluoromethyl, nitro or cyano group, or an alkyl, alkoxy or alkylthio group having from 1 to 6 carbon atoms; and A represents various optionally-substituted 5-membered heterocycles containing up to 3 nitrogen atoms and also in some cases an oxygen atom. These compounds have herbicidal activity.