Synthesis and stereochemistry of some novel dihydropyrrolo[3,4-c]pyrazoles
作者:Yaşar Dürüst、Muhammet Yıldırım、Chris F. Fronczek、Frank R. Fronczek
DOI:10.1007/s00706-011-0618-z
日期:2012.1
AbstractEleven novel dihydropyrrolo[3,4-c]pyrazole derivatives were obtained by the reaction of chiral (1R)-N-(1-phenylethyl)maleimide and C,N-aryl-substituted nitrilimines. The reaction afforded the cycloadducts as a regioisomeric mixture which can be separable in some cases. The structure and stereochemistry of cycloadducts were assigned on the basis of infrared (IR), 1H and 13C nuclear magnetic
摘要通过手性(1 R)-N-(1-苯基乙基)马来酰亚胺与C,N-芳基取代的亚硝胺反应,制得了十一种新颖的二氢吡咯并[3,4- c ]吡唑衍生物。反应得到环加合物,为区域异构体混合物,其在某些情况下是可分离的。根据红外(IR),1 H和13 C核磁共振(NMR),质量和X射线光谱,旋光度测量和CHN分析确定环加合物的结构和立体化学。 图形概要 。
Alkylthio benzoic acid phenyl-hydrazides
申请人:The Upjohn Company
公开号:US04014932A1
公开(公告)日:1977-03-29
Certain new ar or ar' (alkylthio) benzoyl chloride phenylhydrazones have been found to be anthelmintics and active against arthropod pests. The benzoyl ring and the phenylhydrazone ring can be otherwise substituted with, for example, halogen atoms, nitro groups, .alpha.-fluoroalkyl groups, other alkylthio groups, and alkyl groups. The new compounds are prepared by reacting an ar or ar' (alkylthio) benzoic acid 2-phenylhydrazide with phosphorus pentachloride to obtain an ar or ar' (alkylthio) benzoyl chloride (dichlorophosphinyl)phenylhydrazone that is reacted with phenol to produce the desired ar or ar' (alkylthio) benzoyl chloride phenylhydrazones. Certain of the compounds can be prepared by direct halogenation of (alkylthio)benzaldehyde phenylhydrazone or an (alkylthio)benzoyl chloride phenylhydrazone. Methods of anti-arthropodal use and novel formulations for use are also described.