All articles of this category Using the new P(O) t Bu 2 Directed Metalation Group, a variety of ortho -substituted aryl di- t -butylphenylphosphine oxides ( 2a - k ) have been prepared, its relative metalation ability has been established, and reduction and homocoupling products (Scheme 4) have been obtained. directed ortho metalation - ortho -substituted aryldi- t -butylphosphine oxides - 2,2′-bis(di- t -butylphosphinyl)biphenyl - comparative metalation of directed metalation groups
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Gray et al. (1998) studied this question.