Fluoroalkenyl compounds and their use as pest control agents
申请人:Monsanto Company
公开号:US05514717A1
公开(公告)日:1996-05-07
Novel 3,4,4-trifluorobutenoic acid derivatives of the formula ##STR1## wherein Q is --(C.dbd.W)--R.sub.2 wherein W is O or S, and R.sub.2 is an aliphatic or aromatic group when W.dbd.O; --OR.sub.50 ; --SR.sub.50 ; or --NR.sub.50 R.sub.60 wherein R.sub.60 is hydrogen or R.sub.50 ; NR.sub.7 R.sub.8 ; a heterocyclic group; phenyl substituted by alkyl; or any agronomically acceptable salt thereof having usefulness as nematocides, insecticides and acaricides.
2-Oxocephems and 2-Acetylpenems - Selective Formation in an IntramolecularWittig Reaction
作者:Ivan Ernest、Alan J. Main、Robert B. Woodward
DOI:10.1002/hlca.19810640507
日期:1981.7.22
Selective formation - in intramolecular Wittig condensations - of the 2-oxocephem-4-carboxylate 8a and of the 2-acetylpenem-3-carboxylate 9, respectively, was observed as a consequence of different carbonyl reactivities in two homologous α-oxoacylthio groupings. Free, racemic and 7-unsubstituted 2-oxocephem-4-carboxylic acid (10) was prepared from 8a for biological testing. Attempts to prepare the