Answers are grounded in this paper and cite their sources.
2-chloropyrimidine, 2-chloro- and 2-bromo-4,6-dimethylpyrimidines, 2-chloro- and 2-bromo-4,6-diphenylpyrimidines have been dimerized to the corresponding 2,2'-bipyrimidines in good yields by Tiecco's method using NiCl2, triphenylphosphine and zinc in DMF.
No takes yet. Share an insight, caveat, or question.
Nasielski et al. (1991) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: