3-Bromo-l,5-hexadiene

Hegedus and Varaprath studied the reactions of various bromodienes with Ni(CO)4 and with bis(cyclooctadiene)nickel. l-Bromo-2,5-hexadiene and 2-bromomethyl-1,3-butadiene give the stable products 62 and 63, respectively, which resemble allyl nickel halides in their properties (217). Similar compounds had been prepared several years previously from geranyl halides (218). l-Bromo-2,4-pentadiene and l-bromo-2,4-hexadiene, however, formed intractable materials which could not be isolated and purified. In these cases the red color of the solution which was first produced faded and NiBr2 was deposited. The desired compounds, however, could be generated in situ at — 30° C and used in coupling reactions with aryl, alkenyl, and allyl halides (217). 

Bromo-2,5-hexadiene, 41, 51 3-Bromo-l,5-hexadiene, 41, 51 Bromohexadicne (mixture), 41, 50... 

Methyl propargyl ketone, 193 - (48) 5-Chloro-3-hexen-l-yne and 5-bromo-3-hexen-l-yne, 193 - (49) 4,5-Hexadien-2-yn-l-ol, 194 -(so) l-Phenylthio-3-methyl-l,2-butadiene, 195... 

Propargyl bromide 1-Propyne, 3-bromo- (8,9) (106-96-7) Dimethyl acetylenedicarboxylate Acetylenedicarboxylic acid, dimethyl ester (8) 2-Butynedioic acid, dimethyl ester (9) (762-42-5) l,2-Hexadien-5-yne (8,9) (33142-15-3)... 

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