Cuprous phenylacetylide

To a 200-mL, three-necked flask equipped with a nitrogen inlet, a reflux condenser connected to a mercury trap, and a magnetic stirring bar was added 1.86 g cuprous phenylacetylide (0.011 mol) and 80 mL dimethylformamide (DMF). The flask and contents were thoroughly flushed with nitrogen with stirring. Under nitrogen 2.56 g 2-iodo-... 

Cuprous phenylacetylide allowed to react with the startg. nitrone in pyridine under Ng product. Y 60.2%. F. e. s. M. Kinugasa and S. Hashimoto, Chem. Commun. 1972, 466. 

Cuprous tert-butoxidc allowed to react with a large excess of phenylacetylene at room temp. cuprous phenylacetylide. Y 97%. - Because the basic alkoxide group abstracts an active H-atom with formation of an alcohol, additives to create basic or buffered conditions are not needed. F. e., also with cupric tert-butoxide and a cuprous tert-butoxide-phosphine complex, s. T. Tsuda, T. Hashimoto, and T. Saegusa, Am. Soc. 94, 658 (1972). 

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