Journal of Organic Chemistry p. 1365 - 1370 (1985)
Update date:2022-08-16
Topics:
Tsuji, Yasushi
Huh, Keun-Tae
Ohsugi, Yukihiro
Watanabe, Yoshihisa
1,5-Pentanediol reacts with aliphatic and aromatic primary amines in the presence of a ruthenium catalyst modified with phosphonic ligands to give N-substituted piperidines in fair to goods yields.The reactions were carried out at 150-180 deg C for 5 h in dioxane.The nature of the phosphorus ligands has a remarkable effect on the catalytic activity, For the reaction of aromatic amines, triphenylphosphine is effective, while for aliphatic amine more basic tributyl- or triethylphosphine is preferable.Amines also react with diethylene glycol and N-substituted diethanolamines in the presence of the ruthenium catalyst to give N-substituted morpholines and piperazines in good yields, respectively.
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