V.  Soni, Patel, U. N., and Punji, B., ?Metal-free regioselective C-3 acetoxylation of N-substituted indoles: crucial impact of nitrogen-substituent?, RSC Advances, vol. 5, no. 71, pp. 57472-57481, 2015.

U. N.  Patel, Pandey, D. K., Gonnade, R. G., and Punji, B., ?Synthesis of quinoline-based NNN-pincer nickel(II) complexes: a robust and improved catalyst system for C?H bond alkylation of azoles with alkyl halides?, Organometallics, vol. 35, no. 11, pp. 1785?1793, 2016.

U. N.  Patel and Punji, B., ?Copper- and phosphine-free nickel(II)-catalyzed method for C-H bond alkynylation of benzothiazoles and related azoles?, Asian Journal of Organic Chemistry, vol. 7, no. 7, pp. 1390-1395, 2018.

S. M.  Khake, Jain, S., Patel, U. N., Gonnade, R. G., Vanka, K., and Punji, B., ?Mechanism of nickel(II)-catalyzed C(2)-H alkynylation of indoles with alkynyl bromide?, Organometallics, vol. 37, no. 13, pp. 2037-2045, 2018.

U. N.  Patel, Jain, S., Pandey, D. K., Gonnade, R. G., Vanka, K., and Punji, B., ?Mechanistic aspects of pincer nickel(II)-catalyzed C-H bond alkylation of azoles with alkyl halides?, Organometallics, vol. 37, no. 6, pp. 1017-1025, 2018.

U. N.  Patel, Jagtap, R. A., and Punji, B., ?Scope and mechanistic aspect of nickel-catalyzed alkenylation of benzothiazoles and related azoles with styryl bromides?, Organometallics, vol. 38, no. 12, pp. 2422-2430, 2019.