Reactions of Thioacylketene Thioacetals ando-Thioquinone Methides with Enamines

REACTIONS OF DIHYDROPYRIDINES WITH BENZYNE

Reactions of 1 ,Zdihydropyridines (la-c) and 1,4-dihydropyridines (2a-c) in the presence of benzyne (3) under thermal conditions, and in the case of (2c) under photochemical conditions, have been investigated. Benzyne acts as an oxidizing agent to convert dihydropyridine (la) and (2a) to the corresponding pyridine (4) or adds as a dienophile to (lb-c).

Crystal structures of proline-derived enamines.

The isolation and structural characterization of both aldehyde- and ketone-derived proline enaminones are reported and discussed. Crystal structures of 10 proline enamines provide information on stereochemical aspects, i.e., double bond configuration and syn- vs. anti-positioning of the carboxylate relative to the enamine double bond. Furthermore, the obtained crystal structures are compared wi...

Synthesis of enamines and their bromination

Studies with Enamines: Route to Aminoazolopyrimidines and Arylazoazolopyrimidines

The chemistry of azolopyrimidines has in the past received considerable interest [1 – 5] and is still an area of major interest [6, 7]. Recently azoloazines have been shown to be of antimicrobial, antioxidant [8] and agrochemical importance. Moreover they are a promising new class of dyes for D2T2 printing and hair dyes [9, 10]. Microwave heating has been employed as a frequent resource for the...

Acetylation of Some Cyclic Enamines With Substituted Acetyl Chlorides

Acylation reaction of a variety of cyclic ketones via acylation of the corresponding enamines is welldefined in the literature. Enamine acylation of carbonyl compounds is a significant synthetic method because of its mildness and the ease of preparing various β-diketones [1-4]. Acylation reactions are performed by means of converting enamines to the enaminoketones and subsequent hydrolysis of t...