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A nickel-catalyzed protocol for the cycloisomerization of 1,6-dienes has been developed. Using commercially available NiBr₂ and PPh₃ as catalysts, Zn as a reductant, and ZnI₂ as an additive, the methodology efficiently converts various 1,6-dienes into pyrrolidine derivatives in excellent yields and high selectivity.
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Du et al. (2025) studied this question.
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