[EN] N-PHENYLPYRAZOLE DERIVATIVES AS PESTICIDES<br/>[FR] DERIVES DE N-PHENYLPYRAZOLE EN TANT QUE PESTICIDES
申请人:BAYER CROPSCIENCE SA
公开号:WO2006000314A1
公开(公告)日:2006-01-05
The invention relates to polar 5-aminopyrazole carbamate derivatives of formula (I) or salts thereof: (I), wherein the various symbols are as defined in the description, to processes for their preparation, to compositions thereof, and to their use for the control of pests (including arthropods and helminths).
PRODUCTION OF CYCLIC ACETALS OR KETALS USING SOLID ACID CATALYSTS
申请人:Terrill Daniel Latham
公开号:US20120330032A1
公开(公告)日:2012-12-27
A process for making a cyclic compounds such as cyclic acetal or cyclic ketones by feeding aldehyde or ketone compounds and polyhydroxyl compounds to a reaction zone at a molar ratio of polyhydroxyl compounds to aldehyde or ketone compounds of at least 3:1, reacting these compounds in the presence of a solid acid such as an acidic ion exchange resin, to generate a liquid reaction mixture without separating water from the reaction mixture as it is being formed in the reaction mixture, withdrawing the liquid reaction mixture from the reaction zone as a liquid product stream, and feeding the liquid reaction product stream to a distillation column to separate cyclic acetal compounds from unreacted polyhydroxyl compounds, and optionally recycling back the unreacted polyhydroxyl compounds to the reaction zone. The process produces cyclic acetal compounds in yields of at least 90% with long catalyst life. The process is also suitable to make cyclic ketals from ketone compounds.
PRODUCTION OF CYCLIC ACETALS OR KETALS USING LIQUID-PHASE ACID CATALYSTS
申请人:Terrill Daniel Latham
公开号:US20120330033A1
公开(公告)日:2012-12-27
A process for making a cyclic compounds such as cyclic acetal or cyclic ketones by feeding aldehyde or ketone compounds and polyhydroxyl compounds to a reaction vessel at a molar ratio of polyhydroxyl compounds to aldehyde or ketone compounds of at least 3:1, reacting these compounds in the presence of a homogeneous acid catalyst to generate a liquid phase homogeneous reaction mixture containing the acid catalyst without separating water from the reaction mixture as it is being formed in the reaction mixture, withdrawing the liquid phase homogeneous reaction mixture from the reaction vessel as a liquid product stream, and feeding the liquid reaction product stream to a distillation column to separate cyclic acetal compounds from unreacted polyhydroxyl compounds, and optionally recycling back the unreacted polyhydroxyl compounds and/or acid catalyst to the reaction vessel. The process produces cyclic acetal compounds in high yields. The process is also suitable to make cyclic ketals from ketone compounds.
Preparation of isopropylidene acetals from butane-1,2,4-triol and its cyclopropane congeners
作者:Konstantin N. Prokhorevich、Andrei V. Bekish
DOI:10.1016/j.tetlet.2010.05.126
日期:2010.8
Features of isopropylideneacetal synthesis from butane-1,2,4-triol and its cyclopropane congeners were studied. Procedures for the preparation and purification of the respective acetonides have been developed.
Compounds having a selective N-type calcium channel antagonistic activity are provided. Dihydropyridine derivatives represented by the following formula:
1
analogs thereof and pharmaceutically acceptable salts thereof have an activity of selectively inhibiting the action of N-type calcium channel, and they are used as therapeutic agents for various diseases relating to N-type calcium channel.