Benzoylformyl chloride

Perfluoroalkylcopper reagents react with thiocyanates to give perfluoro-alkyl-substituted sulfides in low yields [230] and with benzoylformyl chloride to give the oi-diketone in 49% yield [231] However, other a-ketoacyl halides were prepared in less than 5% yield [231]... 

An ethereal soln. of diethylstyrylamine treated at 0° with benzoylformyl chloride in the presence of a slight excess of triethylamine under anhydrous conditions, after 1 hr. filtered to remove the resulting triethylamine hydrochloride, anhydrous hydrazine and some 2-propanol as solvent added 3,5-diphenyl-4(lH)-pyri-dazone. Y 60%. F. e. s. R. F. Abdulla, Tetrah. Let. 1976, 521. 

Other protecting groups include the benzoylformyl function (introduced as the chloride and removed in pyridine water) and the 2,4-dinitrobenzenesulfenyl function (introduced as the chloride and removed with thiophenol). The photolabile o-nitrobenzyl function, which has been noted as a protecting... 

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