Sabitha, Gowravaram; Srinivas, Chitti; Reddy, Teega Rammohan; Yadagiri, Kurra; Yadav, Jhillu Singh Tetrahedron Asymmetry, 2011, vol. 22, # 24 p. 2124 - 2133 doi: 10.1016/j.tetasy.2011.11.010