β‐Functionalized meso Tetrahalothien‐2‐ylporphyrins: Synthesis, Spectral, and Electrochemical Properties

Electronic and conformational features of derivatives of meso- thien-2-ylporphyrins on protonation and perbromination

“…Other required chemicals were procured from sd fine chemicals, India. Details of the synthesis of perbrominated thienylporphyrins is reported in literature [19].…”

“…Highly altered electronic properties can also be obtained for thienylporphyrins by perbromination at the periphery (pyrrole b-position) [19]. By these methods, the core is neither getting reduced at the double bond (C b @C b ) nor getting protonated at the core.…”

“…A few among those were nitro substituted tetrathien-2-ylporphyrins derivatives [19]. The synthesis of these compounds was simple by nitrating the different thien-2-ylporphyrins using the mild and easy-to-handle nitrating agent, cupric nitrate trihydrate.…”

“…Nitro group was chosen as the substituent on the thienyl ring as it can give further insight to the electrophilic nitration reactions of various types of thienylporphyrins reported previously and also due to its rich synthetic chemistry [24,25]. To assess on the role of conformation of free base form of perbrominated thienylporphyrins in deciding their electronic properties [19], spectral investigations have also been carried out on conformationally similar protonated nitrothienylporphyrins. The chemical structure of the nitro group containing free base porphyrins in the present study is shown in Fig.…”

Synthesis of meso-tetra-(5-iodo-thien-2-yl)-porphyrin; an intermediate for cross-coupling reactions

“…1 With the advent of one-pot processes 2,3 for the synthesis of meso substituted porphyrins, the number of these compounds has increased considerably. Porphyrins with meso-thienyl groups can also be used as building blocks for new porphyrins.…”