References
- Niedermann , H.-P. , Eckes , H.-L. and Meier , H. 1989 . Tetrahedron Lett. , 30 : 155
- Eckes , H.-L. , Niedermann , H.-P. and Meier , H. 1991 . Chem. Ber. , 124 : 377
- Masson , S. , Saint-Clair , J.-F. and Saquet , M. 1993 . Synthesis , : 485
- Grosse-Ruyken , H. and Uhlig , K. 1962 . J. Prakt. Chem. , 18 : 287