Transannular Hydrogen Bonding in Planar‐Chiral [2.2]Paracyclophane‐Bisamides
Transannular Hydrogen Bonding in Planar‐Chiral [2.2]Paracyclophane‐Bisamides
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平面手性中的跨环氢键 [2.2] 对环芳烷双酰胺
DOI:
10.1002/hlca.201900047
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发表时间:
2019
影响因子:
1.8
通讯作者:
Castellano, Ronald K.
中科院分区:
文献类型:
--
作者:
Henderson, Will R.;Fagnani, Danielle E.;Grolms, Jonathan;Abboud, Khalil A.;Castellano, Ronald K.
A series of [2.2]paracyclophane‐bisamide regioisomers and alkylated comparators were designed, synthesized, and characterized in order to better understand the transannular hydrogen bonding of [2.2]paracyclophane‐based molecular recognition units. X‐Ray crystallography shows that transannular hydrogen bonding is maintained in the solid‐state, but no stereospecific self‐recognition is observed. The assignment of both transannularly and intermolecularly hydrogen bonded N−H stretches could be made by infrared spectroscopy, and the effect of transannular hydrogen bonding on amide bond rotation dynamics is observed by1H‐NMR in nonpolar solvents. The consequences of transannular hydrogen bonding on the optical properties of [2.2]paracyclophane is observed by comparing alkylated and non‐alkylatedpseudo‐ortho4,12‐[2.2]paracyclophane‐bisamides. Finally, optical resolution of 4‐mono‐[2.2]paracyclophane andpseudo‐ortho4,12‐[2.2]paracyclophane‐bisamides was achieved through the corresponding sulfinyl diastereoisomers for circular dichroism studies. Transannular hydrogen bonding in [2.2]paracyclophane‐amides allows preorganization for self‐complementary intermolecular assembly, but is weak enough to allow rapid rotation of the amides even in nonpolar solvents.
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影响因子:
16.6
作者:
Fagnani, Danielle E.;Meese, Michael J., Jr.;Castellano, Ronald K.
通讯作者:
Castellano, Ronald K.
DOI:
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发表时间:
2008
期刊:
影响因子:
--
作者:
D. Antonov;V. Rozenberg;T. Danilova;Z. Starikova;H. Hopf
通讯作者:
H. Hopf
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
A. Ruseckas;E. Namdas;J. Lee;S. Mukamel;Shujun Wang;G. Bazan;V. Sundström
通讯作者:
V. Sundström
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Jakob F. Schneider;R. Fröhlich;J. Paradies
通讯作者:
J. Paradies
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
S. B. Ferguson;E. M. Sanford;E. Seward;F. Diederich
通讯作者:
F. Diederich