Formation of substituted benzocyclobutenes through flash vacuum pyrolysis
作者:Peter Schiess、Suzanne Rutschmann、Van Vien Toan
DOI:10.1016/s0040-4039(00)88653-0
日期:1982.1
Benzocyclobutenes carrying a substituent in the four membered ring are obtained in high yield from 2-methyl benzaldehydes through a reaction sequence involving a pyrolytic 1,4-elimination of HCl in the crucial step.
Process for preparing substituted benzotrichloride compounds
申请人:Monsanto Company
公开号:US04593144A1
公开(公告)日:1986-06-03
This invention pertains to a process for preparing substituted and unsubstituted benzotrichlorides. The process generally involves reacting the starting compound with a perchloroalkane with presence of base and a phase transfer catalyst.
Substituted Benzotrichloride Synthesis by Phase Transfer-Catalyzed Chlorination
作者:J. P. Chupp、R. C. Grabiak、K. L. Leschinsky、T. L. Neumann
DOI:10.1055/s-1986-31625
日期:——
A new method for converting benzyl and benzal chlorides to benzotrichlorides is reported. In contrast to prior art, the process involves contacting the substrates with strong alkali in a two-phase system containing phase transfer catalyst using organic soluble perchloralkanes acting upon base-generated carbanions. The method is particularly useful for preparing benzotrichlorides substituted by either alkyl or nitro groups.
Process for the preparation of trichloromethyl-substituted aromatic
申请人:Bayer Aktiengesellschaft
公开号:US04783562A1
公开(公告)日:1988-11-08
Trichloromethyl-substituted aromatic compounds are obtained by the chlorination of thioethers of the formula ##STR1## wherein Ar represents an optionally substituted aryl radial, X.sub.1 denotes hydrogen or halogen, and R.sup.1 represents optionally substituted alkyl, aralkyl, the nitrile group, an optionally substituted aryl radical or the group ##STR2## wherein Ar and X have the meaning given. The compounds, of which some are new, can be used as intermediate products for plant protection agents.
Verfahren zur Herstellung von Trichlormethyl-substituierten aromatischen Verbindungen
申请人:BAYER AG
公开号:EP0061029A1
公开(公告)日:1982-09-29
Trichlormethyl-substituierte aromatische Verbindungen werden durch Chlorierung von Thioether der Formel
in der
Ar für einen gegebenenfalls substituierten Arylrest steht,
X Wasserstoff oder Halogen bedeutet, und
R' für gegebenenfalls substituiertes Alkyl, Aralkyl, die Nitrilgruppe, einen gegebenenfalls substituierten Arylrest oder die Gruppe
in der
Ar und X die oben angegebene Bedeutung haben, steht, hergestellt.
Die teilweise neuen Verbindungen können als Zwischenprodukte für Pflanzenschutzmittel verwendet werden.
三氯甲基取代的芳香族化合物是通过氯化式如下的硫醚得到的
在
Ar 代表任选取代的芳基、
X 是氢或卤素,以及
R' 代表任选取代的烷基、芳烷基、腈基、任选取代的芳基或以下基团
其中
Ar 和 X 具有上述含义。
部分新化合物可用作植物保护产品的中间体。