Co I -Complexes as Redox Catalysts

Very effective and selective syntheses have been performed in this way (see Table 6). Especially valuable is the alkylation 225-228,230-232) acylation 225-228) 

This technique can be used for the synthesis of natural products like pheromones, 3-substituted steroids, cyclopentanoids, sugars, etc. Some examples are given in Eqs. (80)-(82). 

Substrate Redox catalyst (oxidized form) Product Yield (%) Ref. o CTO SB 2. O  

t-X/CO NiClj/PhjP or NiClj/diphos Ar-COjH 40-90 239a)  

6 ArCH(CH3)X/COj NiClj/PhjPCCHJjPPhj ArCH(CH3)COjH 76-81 239b) m 

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