A homonuclear π-system with a singlet carbene-type alpha and a nucleophilic beta phosphorus – first use in P-heterocyclic synthesis
2021
Reactions of a μ2-(η1,η2)-dinuclear diphosphene complex having two W(CO)5 groups with dimethyl acetylenedicarboxylate, 4-phenyl-1,2,4-triazoline-3,5-dione and diethyl azodicarboxylate was applied to P-heterocyclic synthesis, i.e., using a singlet carbene-type reactivity of a homonuclear π-system assisted by a haptotropic shift thus rendering a more nucleophilic beta phosphorus and, hence, a subsequent ring expansion.
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