+++Thanks_Ol.Lo_1 article from Tetrahedron

[pendyala123]

Study of the catalytic properties of tris(3,6-dioxaheptyl)amine (TDA-1) in heteroaromatic nucleophilic substitution of chloropyridines and their N-oxides
Tetrahedron (1987), 43, (11), 2557-64

DOI:

http://dx.doi.org/10.1016/S0040-4020(01)81663-X

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http://www.sciencedirect.com/science/article/pii/S004040200181663X

[Ol.Lo]