合成子
化学
吡咯
立体化学
噻吩
质子核磁共振
类型(生物学)
异核单量子相干光谱
质子化
计算化学
结晶学
核磁共振波谱
有机化学
离子
生态学
生物
作者
Sumit Sahoo,Amina Sama Marzeena,Dandamudi Usharani,Harapriya Rath
标识
DOI:10.1142/s108842462250064x
摘要
A new convergent synthetic methodology has been adopted for syntheses of two hitherto unknown new generation of core-modified N-confused calixphyrins and an all four meso-sp 3 centered heterocyclic macrocycle with [Formula: see text],[Formula: see text]-pyrrole connectivities via acid catalyzed Lindsey type condensation of thiophene diol with N-protected pyrrole(s) using BF 3 .Et 2 O followed by oxidation with chloranil. All of the macrocycles have been achieved in moderately good yields. Their structures, electronic and optical properties have been elucidated by NMR, UV-Vis-NIR spectroscopic analyses and in-depth theoretical calculations. The type of macrocycles are a mere consequence of the type of N-protected pyrroles used as synthons with the UV-Vis spectra closely resembling the spectra for calixphyrins. Detailed structural analyses using 1 H- 1 H (COSY, ROESY), 13 C- 1 H (HSQC) 2D NMR studies and DFT level theoretical investigations indicated lack of macrocyclic [Formula: see text] conjugation with [Formula: see text],[Formula: see text] and/or [Formula: see text],[Formula: see text] pyrrole connectivities.
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