Nicolaou; Hwang; Marron; DeFrees; Couladouros; Abe; Carroll; Snyder
Journal of the American Chemical Society, 1990 , vol. 112, # 8 p. 3040 - 3054

Rothe, Manfred; Zieger, Michael
Tetrahedron Letters, 1994 , vol. 35, # 48 p. 9011 - 9012