A ruthenium-based catalytic system with switchable selectivity between cyclotrimerization and enyne metathesis/Diels–Alder reactions of terminal alkynes
作者:Solmaz Karabulut、Begüm Sariaslan、Bengi Özgün Öztürk
DOI:10.1016/j.catcom.2013.06.023
日期:2013.11
cyclotrimerization and crossenynemetathesis. The cyclotrimerization reaction of phenylacetylene catalyzed by [RuCl2(p-cymene)]2 can be switched to enynemetathesis by the introduction of a sterically hindered N-heterocyclic carbene. The 1,3-diene formed during this reaction reacts with dienophiles to form the Diels–Alder adduct. A practical one-pot synthesis method, utilizing enynemetathesis/Diels–Alder reactions
Method for the preparation of N-(carboxyalkyl) imides
申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP0847991A1
公开(公告)日:1998-06-17
A method is described for the preparation of N-(carboxyalkyl)imides corresponding to the general formula (I)
by the reaction of cyclic anhydrides corresponding to the general formula (II)
with an α,ω-aminoalkylcarboxylic acid corresponding to the general formula (III)
H2N-A-COOH (III).
The method provides an industrially easily practicable synthesis, from inexpensive and easily available starting compounds, of N-(carboxyalkyl)imides possessing a terminal acid function and having alkyl chains containing 1 to 18 carbon atoms.