Reddy, Dandu R; Iqbal, Mohamed A; Hudkins, Robert L; Messina-McLaughlin, Patricia A; Mallamo, John P
Tetrahedron Letters, 2002 , vol. 43, # 45 p. 8063 - 8066

Bredereck; Reif Chemische Berichte, 1948 ,  vol. 81, p. 426,429,433