... 6234 CP BAHL, MR PARTHASARATHY and TR SESHADRI Dehydrogenation of pterocarpol to eudalene (a) Using selenium. An intimate mixture of pterocarpol (500 mg) and selenium (1-5 g) was heated in a sealed tube between 300-350for 30 hr. ... Chem. 905 (1962). 8 KR Verma, TC Jain and SC Bhattacharyya, Tetrahedron 18,979 (1962). 9 G. Buchi, M. Schach, v. Wittenau and Dwain M. White, J. Am. Chem. Soc. 81,1968 (1959). References. 1. ...