Modified Mannich reactions of amines, amino acids and a model peptide with Ph2PH and CH2O gave bis (diphenylphosphinomethyl) amines (Ph2PCH2) 2NR [R= Ph (1), CH2CH2OH (2), CH2COOCH2Ph (3), CH2CONHCH2COOCH2Ph (4), CH2COOH (5)] and (Ph2PCH2) 2NCH2CH2N (CH2PPh2) 2 (6). Reaction with [ReBr3 (CO) 3] 2− under mild conditions led to [ReBr (CO) 3]{(Ph2PCH2) 2NR}[R= Ph (7), CH2CH2OH (8), ...