Strained rings and metal insertions: The product of the reaction between 1,8‐dilithionaphthalene and RPCl2 differs depending on the R group on the phosphorus atom. PhPCl2 gave (PhP)2‐peri‐bridged naphthalene, while iPr2NPCl2 gave the iPr2‐bridged compound (see scheme). The reactivity of the new compounds with transition‐metal complexes is also discussed.
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