Han, Zhengxu; Krishnamurthy, Dhileepkumar; Grover, Paul; Fang, Q. Kevin; Su, Xiping; Wilkinson, H. Scott; Lu, Zhi-Hui; Magiera, Daniel; Senanayake, Chris H. Tetrahedron, 2005 , vol. 61, # 26 p. 6386 - 6408