Process for the preparation of geminal diarylalkanes, new geminal
申请人:Bayer Aktiengesellschaft
公开号:US05136114A1
公开(公告)日:1992-08-04
The invention relates to a new process for the preparation of geminal diarylalkanes of the formula ##STR1## by Friedel-Crafts alkylation of aromatic compounds with specific aliphatic halogen compounds (addition compounds of CCl.sub.4 , to .alpha.-olefins), to new geminal diarylalkanes and the aralkyl compounds resulting as intermediates.
On anchimerically assisted homolysis via sulphide functions
作者:Alexander J. Lawson
DOI:10.1039/c39810001238
日期:——
In contrast to O–O fission, anchimeric assistance from sulphidefunctions in the rate of unimolecular fission of the N–O bond is only marked for heterolysis reactions; analogous homolyses are very much less accelerated, although bridged radical intermediates are involved.
1-Cyano-3-(fluoroalkyl)guanidines of the formula:
in which R1, R2, and R3 are the same or different members of the class of hydrogen, fluorine, lower alkyl or lower alkenyl provided that at least one member is fluorine or fluoro-substituted alkyl or alkenyl. These compounds are useful for their biological properties, e.g. in treating elevated blood pressure and Parkinson's disease.
Verfahren zur Herstellung von geminalen Diarylalkanen, neue geminale Diarylalkane und alk(en)ylierte aromatische Verbindungen
申请人:BAYER AG
公开号:EP0399284A2
公开(公告)日:1990-11-28
Die Erfindung betrifft ein neues Verfahren zur Herstellung von geminalen Diarylalkanen der in Anspruch 1 angegebenen Formel durch Friedel-Crafts-Alkylierung von aromatischen Verbindungen mit bestimmten aliphatischen Halogenverbindungen (Additionsverbindungen von CCl₄ an α-Olefine), neue geminale Diarylalkane und die als Zwischenprodukte entstehenden Aralkylverbindungen.
FLUORINATING AGENT, PROCESS FOR PRODUCING THE SAME, AND USE THEREOF
申请人:Mitsui Chemicals, Inc.
公开号:EP1072576A1
公开(公告)日:2001-01-31
The invention disclose a hydrogen fluoride containing composition comprising hydrogen fluoride and a compound which is liquid in the standard state (25 °C, 1 atmosphere) and has a boiling point of 120 °C or more and pka of 12 or more at 25 °C, and use of the composition for a fluorination agent.
The compound which can be preferably used is represented by the formula (1):
wherein R1 to R4 are a substituted or unsubstituted alkyl or aryl group and can be the same or different, and R1 or R2 or R3 and R4 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom, or R1 and R3 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom.
The fluorination agent of the invention exerts effect with a similar reaction mechanism to hydrogen fluoride, can be applied to the halogen exchange reaction of a halogen containing organic compound, and can produce a fluorine containing compound with safety and ease without specific equipment or technique.