METHOD FOR ISOMERIZING 9,10-DIHYDROLYSE ENERGY DERIVATIVES.

摘要

PCT No. PCT/CH81/00105 Sec. 371 Date Apr. 26, 1982 Sec. 102(e) Date Apr. 26, 1982 PCT Filed Sep. 23, 1981.The invention concerns a process for the isomerization of ergoline derivatives substituted in the 8 beta position by an electron withdrawing radical to the corresponding 8 alpha compounds by removal of the proton in the 8 alpha position and by a following, separately effected, protonation.