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Tris (1-benzyl-5-indolinyl)phosphine oxide, the structure of which was confirmed by alternative synthesis, is formed as a side product along with the previously described dimethyl-1-benzylindoline-5-phosphonate in the reaction of 1-benzyl-5-lithioindoline with dimethyl chlorophosphate. Dimethyl l-benzylindole-5-phosphonate was obtained by the dehydrogenation of dimethyl 1-benzylindoline-5-phosphonate with chloranil. The catalytic dehydrogenation of this same indollne is accompanied by debenzylation, which leads to dimethyl indole-5-phosphonate, and by splitting of the p-C bond.
KeywordsOxide Organic Chemistry Dimethyl Indole Dehydrogenation
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