for boron‐promoted ether interchange reaction of methoxynitroarenes is reported. A series of methoxynitroarenes and alcohols, including primary, secondary, as well as tertiary alcohols, reacted smoothly in moderate to good yields under the optimized reaction conditions. This protocol is an operationally simple and scalable strategy for the synthesis of alkyl nitroaromatic ethers.
Synthesis of (p-Nitroaryl)diarylmethanes via Vicarious Nucleophilic Substitution of Hydrogen
作者:M. Ma˛kosza、M. Surowiec、S. Voskresensky
DOI:10.1055/s-2000-6411
日期:——
(p-Nitroaryl)diarylmethanes are readily prepared via vicarious nucleophilic substitution of hydrogen in nitroarenes with carbanions of diarylmethyl p-chlorophenyl sulfide. These carbanions are efficient for introduction of diarylmethyl substituents in the para position of nitroarenes via the VNS reaction. The reaction does not proceed ortho to the nitro group due to steric hindrances on the addition step.
Substituent Effects on the Electrophilic Activity of Nitroarenes in Reactions with Carbanions
作者:Sylwia Błażej、Mieczysław Mąkosza
DOI:10.1002/chem.200800821
日期:2008.12.8
as a model reaction because it meets key criteria, such as the wide range of substituents that can be present on the nitrobenzene ring, a low sensitivity to steric hindrance, and in particular the possibility of ensuring conditions in which the overall relative rates of reaction in competitive experiments are equal to the relative rates of nucleophilic addition. The values of relative rates of addition
The present invention aims to provide a compound having a PDE inhibitory action and useful as a medicament for the prophylaxis or treatment of schizophrenia and the like.
A compound represented by the formula (1
x
):
wherein each symbol is as described in the DESCRIPTION, or the formula (1):
W
1
—W
2
(1)
wherein each symbol is as described in the DESCRIPTION,
or a salt thereof.
[EN] COMPOSITION AND METHOD FOR CONTROLLING ARTHROPOD PESTS<br/>[FR] COMPOSITION ET PROCÉDÉ DE CONTRÔLE DES INSECTES ARTHROPODES NUISIBLES
申请人:SUMITOMO CHEMICAL CO
公开号:WO2011049221A1
公开(公告)日:2011-04-28
The present invention provides: an arthropod pests control composition comprising, as active ingredients, a condensed heterocyclic compound and a pyrethroid compound; a method for controlling arthropod pests which comprises applying effective amounts of a condensed heterocyclic compound and a pyrethroid compound to the arthropod pests or a locus where the arthropod pests inhabit; and so on.