Rare earth complexes of chiral unsymmetrical hexaazamacrocycles

Wolska, K.; Janczak, Jan; Gawryszewska, Paula; Lisowski, Jerzy

doi:10.1016/j.poly.2021.115057

Cited by 3 publications

(3 citation statements)

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“…Similarly, a large [6 + 3 + 3] macrocycle 65 (Figure 32), which can be obtained in macrocycle expansion reaction of 63 under the template action of cadmium(II) ions followed by reduction to the amine form, is an enantiopure chiral analog of meso-type macrocycle 59 but has no S 6 symmetry axis. Mixed imine/amine unsymmetrical [2 + 2] or [2 + 1+1] macrocycles can be obtained as lanthanoid(III) complexes in a multi-step synthesis involving protection/deprotection reactions (Figure 33) [130]. Mixed imine/amine unsymmetrical [2 + 2] or [2 + 1 + 1] macrocycles can be obtained as lanthanoid(III) complexes in a multi-step synthesis involving protection/deprotection reactions (Figure 33) [130].…”

Section: Macrocycles Containing Different Diamine Fragmentsmentioning

confidence: 99%

“…Mixed imine/amine unsymmetrical [2 + 2] or [2 + 1+1] macrocycles can be obtained as lanthanoid(III) complexes in a multi-step synthesis involving protection/deprotection reactions (Figure 33) [130]. Mixed imine/amine unsymmetrical [2 + 2] or [2 + 1 + 1] macrocycles can be obtained as lanthanoid(III) complexes in a multi-step synthesis involving protection/deprotection reactions (Figure 33) [130].…”

Section: Macrocycles Containing Different Diamine Fragmentsmentioning

confidence: 99%

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Imine- and Amine-Type Macrocycles Derived from Chiral Diamines and Aromatic Dialdehydes

Lisowski

2022

Molecules

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The condensation of aromatic dialdehydes with chiral diamines, such as 1,2-trans-diaminocyclohexane, leads to various enantiopure or meso-type macrocyclic Schiff bases, including [2 + 2], [3 + 3], [4 + 4], [6 + 6] and [8 + 8] condensation products. Unlike most cases of macrocycle synthesis, the [3 + 3] macrocycles of this type are sometimes obtained in high yields by direct condensation without a metal template. Macrocycles of other sizes from this family can often be selectively obtained in high yields by a suitable choice of metal template, solvent, or chirality of the building blocks. In particular, the application of a cadmium(II) template results in the expansion of the [2 + 2] macrocycles into giant [6 + 6] and [8 + 8] macrocycles. These imine macrocycles can be reduced to the corresponding macrocyclic amines which can act as hosts for the binding of multiple cations or multiple anions.

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Section: Macrocycles Containing Different Diamine Fragmentsmentioning

confidence: 99%

Section: Macrocycles Containing Different Diamine Fragmentsmentioning

confidence: 99%

Imine- and Amine-Type Macrocycles Derived from Chiral Diamines and Aromatic Dialdehydes

Lisowski

2022

Molecules

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“…10 For mononuclear SMMs, a strong axial crystal field (CF) and a specific coordination symmetry play a significant role in the effective energy barrier (U eff ) to the spin reversal and blocking temperature (T B ). [11][12][13][14][15] However, it is difficult to control the coordination geometry of Ln ions due to their lack of directional preferences, 16 especially under aerobic conditions. Therefore, a number of complexes based on Dy III ions have been constructed under rigorous anaerobic and anhydrous conditions.…”

Section: Introductionmentioning

confidence: 99%