Copper dialkylamides

Nucleophilic substitution of dibenzofurans has been little studied. Bromo and iodo compounds are converted into the amino compounds on autoclaving with aqueous ammonia in the presence of copper(I) bromide (730PP125). Iodo compounds can be converted into phenols with aqueous potassium hydroxide at 250 °C (65MI31100), but dibenzofuran is cleaved to 2,2 -dihydroxybiphenyl on fusion with sodium hydroxide. Animation of halo compounds can be achieved with sodamide but 4-halo compounds undergo cine substitution on treatment with sodamide or lithium dialkylamides and the 2-substituted compounds result (56JOC457). 1,2,3,4-Tetrafluoro- and octafluoro-dibenzofuran react with nucleophiles at the 3-position (Scheme 101) (67T4041,68JCS(C)1560). 

There has been little systematic study of silver(I) with these ligands, or indeed, with the copper triad as a whole. Cu1 and Au1 dialkylamides have been reported, although no mention was made of analogous Ag1 complexes.122 The explosive Ag3N has been known for some time123 and AgNI2 was reported in 1893.124... 

Copper(I) Dialkylamides. Only a few are known so far, colorless [Cu(NEt2)]4 is a tetramer. 

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