1. Stobbe, H. Ber. 1893, 26, 2312. Hans Stobbe (1860–1938) was born in Tiehenhof, Germany. He earned his Ph.D. In 1889 at the University of Leipzig where he became a professor in 1894.
2. Zerrer, R.; Simchen, G. Synthesis 1992, 922–924.
3. Yvon, B. L.; Datta, P. K.; Le, T. N.; Charlton, J. L. Synthesis 2001, 1556–1560.
4. Liu, J.; Brooks, N. R. Org. Lett. 2002, 4, 3521–3524.
5. Giles, R. G. F.; Green, I. R.; van Eeden, N. Eur. J. Org. Chem. 2004, 4416–4423.