A visible light mediated highly selective benzylic C-H bond functionalization for intermolecular C-N and C-O bond formation is reported. This cross-dehydrogenative coupling reaction demonstrates a straightforward protocol for incorporating the heteroaromatics to the benzylic position. Benzylic oxidation of various alkyl aryls to corresponding carbonyl compounds has also been reported.

An organic dye-catalyzed visible light-promoted ketocarbonylation protocol of vinyl arenes has been disclosed with the help of α-bromocarbonyls where aerial oxygen played a role of an oxidant to install the keto-oxygen functionality. This unique process is compatible with both internal and terminal olefins and tolerates a diverse array of functional groups (ketone, ester, amide, diketones, ketoester, and malonate). This process is mild and environmentally friendly and deals with greener oxidants like oxygen, affording 1,4-ketocarbonyls as a value-added end product.

The N‐confused pyritriphyrin(3.3.1) was synthesized by switching the bonding mode of subpyriporphyrin with inclusion of two o‐phenylene rings in the macrocyclic core and prevails nonaromatic character due to the local aromatic characteristic of the embedded 3,5‐diphenylpyridyl unit. The simplest contracted derivative of N‐confused pyricalixphyrin such as calix[2]phyrin(2.2.1.1.1) is mainly achieved; (a) along with N‐confused pyritriphyrin; (b) by changing the reaction condition and (c) from N‐confused pyritriphyrin by using simple reducing agent. The conversion of N‐confused pyritriphyrin to respective calixphyrin analogue was elusive so far. The molecular structure of calixphyrin is unambiguously confirmed by crystal analysis which reveals its partial ruffled conformation with exclusively amine pyrrole units in the macrocyclic core in spite of steric congestion, which is unprecedented to date.

Herein, we report am ild and simple method for the highly selective C(sp 2 )ÀHa mination reaction of arenes through visible-light-mediated photoredoxc atalysis with var-ious amines, including imidazole, triazole, and tetrazole. This procedure has broad application for ar ange of aromatic compounds and heterocycles. Scheme1.Our proposed C(sp 2 )ÀHf unctionalization of arenes for the formation of CÀNb onds by using visible-light-inducedp hotoredoxc atalysis. Yield:2 05.3 mg (72 %);t hick liquid; 1 HNMR (400 MHz, CDCl 3 ): d = 8.19 (d, J = 8.3 Hz, 1H), 7.62-7.45 (m, 3H), 7.23 (s, 1H), 6.98 (s, 1H), 4.36 (s, 2H), 4.02 (d, J = 15.1 Hz, 3H), 3.92 (s, 3H), 2.98 ppm (s, 1H); Yield:2 08.7 mg (74 %);w hite solid;m .p. 78 8C; 1 HNMR (400 MHz, CDCl 3 ): d = 8.35-8.15 (m, 7H), 8.33-8.18 (m, 7H), 7.50 (t, J = 7.6 Hz, 16 H), 7.50 (t, J = 7.6 Hz, 16 H), 6.63 (dd, J = 11.7, 2.7 Hz, 9H), 6.63 (dd, J = 11.7, 2.7 Hz, 9H), 3.89 (s, 15 H), 3.86 (d, J = 18.0 Hz, 31 H), 3.84 (s, 15 H), 1.88 (s, 1H), 1.27 ppm (s, 2H); 13 CNMR (101 MHz, CDCl 3 ): d =