Process for the preparation of enamines; novel enamines and the use of enamines in the preparation of dihydropyridines
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0086510A2
公开(公告)日:1983-08-24
Process for the preparation of enamines according to formula
wherein R1 = (substituted) alkyl, aryl, alkaryl or aralkyl and R2 = H, Hal, R1, R1SO2 or CN or R1 and R2 together form part of a ring system containing at least 3 carbon atoms, by reacting a compound according to formula
with a hydride-type reducing agent, in particular LiAlH4 or NaBH4. The enamines (some of which are novel) can be used for the preparation of interesting chemicals, e.g. novel dihydropyridines by reacting enamines wherein R2=H with β-unsaturated ketones such as chalcone.
Adsorbent comprising a coating of polyethyleneimine derivatized with a hydrophobic group, its production and its use for immunoassays and separations
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0341498A1
公开(公告)日:1989-11-15
An alternative process for immobilizing biological materials on plastic surfaces utilizing tosyl poly(ethyleneimine) which is relatively inexpensive to prepare, readily available, does not present an environmental threat and is not carcinogenic. The binding capacity of the plastic surface is substantially increased, the biological activity of the bound material is not significantly altered and the bound material is resistant to desorption.
Specifically, the above pertains to surfaces preactivated with a coating of poly(ethyleneimine) derivatized with a hydrophobic group. It also relates to a method of preparing these surfaces, as well as to the use of these preactivated surfaces in immunoassays and bioaffinity separations.
β-Arylsulphonylvinylamines: synthesis and use in a new route to dihydropyridines
作者:Ben L. Feringa
DOI:10.1039/c39850000466
日期:——
The title compounds are obtained by reduction of arylsulphonylmethyl cyanides and can be used as α-aza-allyl anion synthons in a newroute to dihydropyridines.