Reaction of diketene-acetone adduct with enamines, ketene acetals, vinyl ethers, and .BETA.-diketones.

Gallium tribromide catalyzed coupling reaction of alkenyl ethers with ketene silyl acetals.

Preparation and the Microwave and Infrared Spectra of Vinyl Ketene

Vinyl ke t ene (1 ,3-butadienel -one) has been synthesized b y v a c u u m pyrolysis of 3-butenoic 2-butenoic a n h y d r i d e . The microwave and inf rared spectra of v inyl ke tene in t h e gas phase a t room t e m p e r a t u r e h a v e been s tudied. The f rans ro tamer has been identif ied, a n d t h e spectroscopic cons t an t s were found t o be A = 39571(48) MHz, B = 2392.9252(28) MHz...

Reactions of vinyl ethers with cobalamins and cobaloximes.

Sir: We recently reported 1 that cobaloximes and cobalamins reacted with vinyl ethers, in the presence of alcohols, to give aceta Is containing cobalt-carbon cr-bonds. On the basis of these, and earlier 2 experiments, we suggested that the reactions proceeded via the intermediary of a Co(lII)-olefin 7r-complex. Schrauzer, et al.,3 then reported that they were unable to confirm our results and c...

Studies on Oxygenated Fuel Additives: Ethers and Acetals

Ever increasing political pressure for a cleaner environment has triggered large research efforts over the past decade within the automobile and solvent industries to develop new, oxygenated, low atmospheric reactivity fuels and solvents, respectively. The main stimulus for the interest in such compounds in Europe is existing or pending legislation demanding the regulation of the reactivity of ...

Reaction of heterocyclic enamines with nitrile oxide and nitrilimine precursors.

Alkylidenepyrrolidines 1, 21, 24 and 26 undergo reactions with nitrile oxides and nitrilimines or their precursors to give a range of novel heterocyclic compounds. With alkylidenepyrrolidine ester 1, nitrolic acids give products in which the liberated nitrous acid reacts with the alkylidenepyrrolidine, followed by two cycloadditions to give adducts 3. In contrast, hydroximoyl chlorides give iso...