Pentafluorophenyl isocyanide

A guanidine obtained from a pentafluorophenyl isocyanide dichloride and aniline is cyclized to a tetrafluorobenzimidazole [106] (equation 92). 

The reaction of the gold(I) pentafluorophenyl isocyanide complexes with primary and secondary amines as well as alcohols leads to the corresponding gold(I) [62, 65] carbenes (Table 3.2). The addition of amines leads to the corresponding carbenes... 

A guanidine derivative 43 is obtained in 60% yield from pentafluorophenyl isocyanide dichloride (42) and aniline.26... 

In a project on electron-deficient isocyanides, Lentz studied the reactivity of pentafluorophenyl isocyanide 4a, isocyanoacetonitrile 4b, pentacarbonylchromium diisocyanomethane 4c, and 2,2,2-trifluoroethylisocyanide 4d toward bis[tris(trimethylsilyl)methyl] diphosphene 3. Combination of the reactants in pentane or diethyl ether at ambient temperature led to the formation of the expected diphosphirane imines 5a-5d as yellow crystals in moderate yields (Equation 2). For the success of this process very bulky substituents at the P=P unit and electron-withdrawing groups at the nitrogen atom are required, which is evident by the decrease of thermostability in the series 5c m 5a >5b>5d <1998JFC73, 1999ZFA1934>. 

Neutral ylide, isocyanide and carbene pentafluorophenyl gold] 111) complexes with the general formulae trans-[Au]C6F5)X2]CH2PR3)[ ]PR3 = PPh3, PPh2Me, PPhMe2),... 

Uson, R., Laguna, A., Vicente, J., Garcia, J., Bergareche, B. and Brun, P. (1978) Neutral isocyanide and carbene pentafluorophenyl complexes of gold(l) and gold(lll). Inorganica Chimica Acta, 28 (2), 237-243. 

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