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Beilstein J. Org. Chem. 2015, 11, 169–173, doi:10.3762/bjoc.11.17
Graphical Abstract
Scheme 1: Synthesis of 1-alkyl-1,2-diphospholes 1a–e.
Scheme 2: The cycloaddition reactions of 1-alkyl-1,2-diphospholes 1a–e.
Figure 1: ORTEP view of 2,3,4,4a,5,6-hexa(p-fluorophenyl)-1-ethyl-1,7,7a-triphospha-4,7-(ethylphosphinidene)i...
Scheme 3: The retro-Diels–Alder reactions of the cycloadducts 2a–с, and 2e.