Reactions of Miscellaneous Haloketones

2 Reactions of Miscellaneous Haloketones - Acetyl chloride undergoes photochemical loss of HCl when irradiated either neat or in a matrix.Irradiation of 3-chloropropanoyl chloride in a matrix using wavelengths greater than 230 nm yields 3-chloro-l,2-propenone and acryloyl chloride as the principal photochemical products.  

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Reactions of Miscellaneous Haloketones and Acid Chlorides - Photochemical chlorocarbonylation of the polycyclic tetradecane (196) results in the formation of mixture of isomeric acid chlorides which, on treatment with... 

Reactions of Miscellaneous Haloketones and Acid Chlorides. - The reactivity of anions such as (91) with 1,2-dihalobenzene (a. 1,2-diiodo, b.l-chloro-2-iodo and c. l-bromo-2-iodo) derivatives has been studied. The irradiations are brought about in DMSO as solvent. The reaction affords (92) as the principal product in variable yields (71 % from b, 86% from c and 50% from a), depending on which of the arene derivatives is used. The other product (93,17%) is formed only from reaction with o-diiodobenzene. The irradiation of the acid fluoride CF3CF2C(0)F has been described as an efficient route for the production of the radical, CF3CF2. This radical can recombine with CFO to afford the starting... 

Reactions of Miscellaneous Haloketones and Acid Chlorides. - UV irradiation of fluorocarbonyl iodide results in the formation of (OCIF)... 1 and (OCFI)... F complexes,while ab initio methods have been used to interpret the photoreactivity of bromoacetyl chloride. A further study on the latter system has shown that the C-Cl bond ruptures on irradiation at 248 nm. " ... 

The two major methods of preparation are the cycloaddition of nitrile oxides to alkenes and the reaction of a,/3-unsaturated ketones with hydroxylamines. Additional methods include reaction of /3-haloketones and hydroxylamine, the reaction of ylides with nitrile oxides by activation of alkyl nitro compounds from isoxazoline AT-oxides (methoxides, etc.) and miscellaneous syntheses (62HC(i7)i). 

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