(1 Z ,3 Z )-Buta-1,3-dienyl-1-lithium species and substituted tellurophenes by Te/Li exchange on (1 Z ,3 Z )-butyltelluro-1,3-butadienes and (1 Z ,3 Z )-1,4-bis(butyltelluro)-1,3-butadienes
Synthesis of Selenium and Tellurium Core-Modified Azuliporphyrinogens and Benziporphyrinogens and Corresponding Carbaporphyrinoids
作者:Sohail Ahmad、Anchal Singhal、Kharu Nisa、S. M. S. Chauhan
DOI:10.1021/acs.inorgchem.8b00648
日期:2018.9.17
The synthesis of selenium and tellurium core-modified carbaporphyrinogens was carried out by the reaction of functional selenophene/tellurophene diols with azulene or a benzitripyrrane in the presence of acid. The products were obtained in moderate yields and were characterized by using 1H and 13C NMR, UV–vis, FT-IR, CV, and HRMS spectroscopic techniques. Further, oxidation of the obtained core-modified
硒和碲核心修饰的碳卟啉原的合成是在酸存在下,通过功能性硒烯/碲代二醇与和苯并三苯并吡喃反应进行的。产品以中等收率获得,并通过1 H和13 C NMR,UV-vis,FT-IR,CV和HRMS光谱技术进行了表征。此外,在DDQ存在下于CHCl 3中氧化获得的核心修饰的碳卟啉原,以良好的收率得到相应的碳卟啉。如通过使用质子NMR光谱法所证实的那样,苯并卟啉没有显示出环电流或大环芳族的迹象,但是TFA的加入引起了弱亲核指示的形成。
Synthesis of 21,23-Selenium- and Tellurium-Substituted 5-Porphomethenes, 5,10-Porphodimethenes, 5,15-Porphodimethenes, and Porphotrimethenes and Their Interactions with Mercury
作者:Sohail Ahmad、Kumar Karitkey Yadav、Soumee Bhattacharya、Prashant Chauhan、S. M. S. Chauhan
DOI:10.1021/acs.joc.5b00007
日期:2015.4.17
The 3+1 condensation of symmetrical 16-Selena/telluratripyrranes with symmetrical selenophene-2,5-diols/tellurophene-2,5-diols in the presence of BF3-etheratre or BF3-methanol followed by oxidation with DDQ gave 5,10-porphodimethenes, whereas the process with unsymmetrical selenophene-2,5-diols/tellurophene-2,5-diols gave 5-porphomethenes. In addition, the reaction of unsymmetrical 16-Selena/telluratripyrranes with symmetrical selenophene-2,5-diols/tellurophene-2,5-diols gave the corresponding porphotrimethenes, whereas the process with unsymmetrical selenophene-2,5-diols/tellurophene-2,5-diols gave the 5,15-porphodimethenes. The structures of different products were characterized by IR, H-1 and C-13 NMR, (HH)-H-1-H-1 COSY, CHN analysis, and mass spectrometry. The binding of mercury with the calix[4]phyrins mentioned above had been observed in the decreasing order of porphodimethenes > porphomethenes > porphotrimethenes by UV-vis and H-1 NMR spectroscopy.