Devari, Shekaraiah; Deshidi, Ramesh; Kumar, Manjeet; Kumar, Arvind; Sharma, Simmi; Rizvi, Masood; Kushwaha, Manoj; Gupta, Ajai Prakash; Shah, Bhahwal Ali Tetrahedron Letters, 2013, vol. 54, # 48 p. 6407 - 6410 doi: 10.1016/j.tetlet.2013.09.036