期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 77, 期 22, 页码 9970-9978出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo3020402
关键词
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资金
- Polish National Science Centre [DEC-2011/02/A/ST5/00459]
- CONACyT Mexico
- National Science Foundation [DMR1101934, CHE0-844455]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0844455] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1101934] Funding Source: National Science Foundation
In this work, we describe the synthesis and solid-state dynamics of isomeric molecular rotors 7E and 7Z, consisting of two androstane steroidal frameworks linked by the D rings by triple bonds at their C17 positions to a 1,4-phenylene rotator. They are also linked by the A rings by an alkenyl diester bridge to restrict the conformational flexibility of the molecules and reduce the number of potential crystalline arrays. The analysis of the resulting molecular structures and packing motifs offered insights of the internal dynamics that were later elucidated by means of line shape analyses of the spectral features obtained through variable-temperature solid-state C-13 NMR; such analysis revealed rotations in the solid state occurring at kilohertz frequency at room temperature.
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