Citation: Ru Yu CHEN, Ke Sheng FENG. SYNTHESIS OF 3,4-DIPHENYL-1.3,4-DIAZAPHOSPHOLIDIN-2-ONE-4-OXIDE BY MANNICH-TYPE REACTION[J]. Chinese Chemical Letters, ;1992, 3(1): 11-14.
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Phenylurea reacted with dichlorophenylphosphine and aldehydes or ketones by Mannich-type reaction in anhydrous benzene to give five-mem-bered phosphorous heterocyclic compounds.However.derivatives of α-ureidoalkylphosphonic acids were obtained as the reaction performed in glacial acetic acid.
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