(A) In 2020, Mondal et al., [22] have been reported an efficient synthesis of porphyrin via a putative trans-manganese(IV) dihydroxide intermediate. (B) It has been investigated the selective on-surface synthesis of a Por-GNR hybrid containing of two porphyrin(por) related to a short graphene nanoribbones (GNRs) segment [23]. (C) Metalloporphyrin can be used as a facile homogenous photocatalyst [24]. Zinc porphyrin (ZnTEPP) and perylene bisimide (PBI) have been produced based previously reported procedure [25,26]. In 2019, Gua et al., [27] have been investigated a zinc-porphyrin-based porous organic polymer bearing an electron donor and an electron acceptor (ZnTEPP-PBI). This compound has been used as a heterogeneous photocatalyst for oxidative homocoupling of amines to imines under visible light. (D) Under light irradiation porphyrin not only are able to transfer energy but also participate in electron transfer procedure, producing an enamine cation and carbene in the triplet state, thus, facilitating functionalization of aldehydes at the α-position. As result, porphyrins are strongly believed to be as photoredox catalysts in C-C bond forming reaction [28]. (E) the epoxidation of alkenes is one of the processes of great importance in the fine chemical industry from an economic point of view, because epoxide is useful intermediate in the production and manufacture of high-value commercial polymers like polyurethane, polyamide, resins, and polyester [29]. In addition, this transformation is used to carry out bioinspired oxidation [30] to produce drug candidates or metabolites. (F) Metalloporphyrins have been used as oxidative agents. Manganese porphyrin is appropriate catalyst for transformation of primary alcohols to the corresponding aldehyde and carboxylic acids [31]. (G) Simonneaux et al., [8,9] have studied enantioselective epoxidation of styrene derivatives by using H2O2, in water-methanol solution through chiral water-soluble manganese and iron porphyrin as catalysts. (H) Burg et al., [32] have been investigated enantioselective oxygenation of exocyclic methylene groups by using manganese porphyrin catalyst with a chiral recognition site. (I) Porphyrins with unsaturated metal centers within framework compounds can function as efficient Lewis acid catalysts by offering available coordination sites and facilitating the catalytic transformation within open pore spaces of framework compounds. In this regard, one model reaction is the ring-opening of styrene epoxide with trimethylsilylazide (TMSN3). Takaishi, and coworkers have been reported a Zn-based porphyrin MOF (ZnAl-RPM) that could catalyze this ringopening reaction efficiently due to the strong Lewis acidity of Al(III) sites in the porphyrin linkers [33]. Later, Stoddart, and coworkers have been also designed a tandem catalytic system that couples a Fe-porphyrin catalyzed epoxidation of styrene with a subsequent Hf6 cluster catalyzed epoxide ring opening by using a recyclable heterogeneous PCN-222/MOF-545(Hf) catalyst [14]. (J) Sulfoxidation is commonly presented as being a direct pathway for generating sulfoxides, however, most of the reagents that have been used for this reaction are such as iodosylbenzene, peroxyacids, and stoichiometric oxo-metal oxidants are unsatisfactory due to their high toxicity and low chemoselectivity between sulfoxide and sulfone products [34]. One successful example of a green protocol has been described by Baciocchi and coworkers, so that the oxidation of sulfides with an ethanolic solution of H2O2 and iron tetrakis(pentafluorophenyl)porphyrin as catalyst, thus giving the corresponding sulfoxides on a gramscale [35]. (K) In 2012 Simonneaux and co-workers have been reported examples of enantioselective hydroxylation of alkanes, with a chiral iron porphyrin as a catalyst and using hydrogen peroxide as an oxidant in methanol and water, to give optically active secondary alcohols (ee up to 63%) [8]. (L) In 2009 Neu et al., have been reported metalloporphyrins as oxidative agents. Manganese porphyrin is an appropriate catalyst for the oxidation of 2-methylnaphthalene by the (FePct-Bu4)2 Opolymeric iodosylbenzene system [17]. © Islamic Azad University.