206136-41-6

Basic information

• Product Name: N-(3-aminopropyl)-N'-heptadeuteriobenzyl-N-methyl-1,3-propanediamine
• CAS NO: 206136-41-6
• Molecular Weight: 242.317
• Mol File: 206136-41-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: N-(3-aminopropyl)-N'-heptadeuteriobenzyl-N-methyl-1,3-propanediamine(CAS DataBase Reference)
• NIST Chemistry Reference: N-(3-aminopropyl)-N'-heptadeuteriobenzyl-N-methyl-1,3-propanediamine(206136-41-6)
• EPA Substance Registry System: N-(3-aminopropyl)-N'-heptadeuteriobenzyl-N-methyl-1,3-propanediamine(206136-41-6)

Safety Data

• Hazardous Substances Data: 206136-41-6(Hazardous Substances Data)

Upstream product

• 105-83-9 3,3'-Diamino-N-methyldipropylamine 
• 59502-05-5 benzyl chloride-d7 

Relevant articles and documents

Mechanistic Studies on Cyclopalladation of the Solvated Palladium (II) Complexes with N-Benzyl Triamine Ligands in Various Solvents. Crystal Structures of [Pd(Sol)(Bn2Medptn)](BF4)2 (Sol = Acetonitrile and N, N-Dimethylformamide; Bn2Medptn = N, N′-Dibenzyl-4-methyl-4-azaheptane-1,7-diamine) and [Pd(H-1Bn2Medptn-C, N

Several solvated palladium(II) complexes with the potentially cyclopulladating dibenzyl ligand have been synthesized. These include [Pd(CH3CN)(Bn2Medptn)](BF4)2 (1) (Bn2Medptn = N, N'-dibenzyl-4-methyl-4-azaheptane-1,7-diamine), [Pd(dmf)(Bn2Medptn)](BF4)2 (2) (dmf = N, N-dimethylformamide), and [Pd(dmso)(Bn2Medptn)](BF4)2 (3) (dmso = dimethyl sulfoxide), their cyclopalladated complex, [Pd(H-1Bn2Medptn-C, N, N', N'')]CF3SO3 (4), the solvated monobenzyl complex, [Pd(CH3CN)(BnMedptn)](BF4)2 (5) (BnMedptn = N-(3-aminopropyl)-N'-benzyl-N-methyl-1,3-propanediamine), and its deuterated complex, [Pd(CH3CN)(BnMedptn-d7)](BF4)2 (6) (BnMedptn-d7 = N-(3-aminopropyl)-N'-heptadeuteriobenzyl-N-methyl-1,3-propanediamine). The crystal structures of 1·CH3CN·CH2Cl2, 2, and 4 have been determined by X-ray structure analysis to characterize the reactant and the product for the cyclopalladation of the solvated complexes, where one of the ortho carbons of 1 is directed toward the palladium(II) center (Pd···C(1) = 3.513(9) A). The rate constants for the cyclopalladation of 1 at 25°C in various solvents increase in the order DMF 298 = 5.74 × 10-6, ΔH? = 104.0±1.2kJmol-1 and ΔS? = 3.5±3.9 JK-1 mol-1 for 1 in DMF, k298 = 3.13 × 10-4 s-1, ΔH? = 83.8±2.6 kJ mol-1 and ΔS? = -31.0±8.8 JK-1 mol-1 for 1 in DMSO, k298 = 1.30×10-4 s-1, ΔH? = 81.2±0.5 kJ mol-1 and ΔS? = -47.0±1.8 J K-1 mol-1 for 5 in DMF, k298 = 1.76×10-3 s-1 for 5 in DMSO, k298 = 1.26×10-5 s-1, ΔH? = 92.8±1.4 kJ mol-1 and ΔS? = -27.5±4.4 J K-1 mol-1 for 6 in DMF and k298 = 2.69×10-4 s-1 for 6 in DMSO. The activation enthalpy is reduced as the solvent basicity increases. The kinetic isotope effects (kH/kD) for the cyclopalladation of the monobenzyl complex at 25°C are calculated to be 10.3 in DMF and 6.5 in DMSO using the rate constants for 5 and 6. It is confirmed from the kinetic results obtained that the nucleophilic attack of the basic solvent on the ortho proton is essential for the C-H bond cleavage observed in the activation process. In addition, the fact that the rate constant for the cyclopalladation is proportionally dependent on the concentration of DMSO in nitromethane strongly suggests that the solvent-dissociation pre-equilibrium is negligible in neat basic solvent.