94394-65-7Relevant academic research and scientific papers
Preparation of β-Substituted trans-Ethylene Diphenylphosphines and Sulphides by P(O) and P(S)-activated Olefination
Gloyna, Dieter
, p. 360 - 366 (2007/10/02)
Methylene bis-diphenylphosphine monoxide (3c) in toluene reacts regiospecifically and stereoselectively with aldehydes in the presence of potassium tert-butoxide to β-substituted trans-ethylene diphenylphosphines 6, which can be oxidized to the sulphides 2 by sulphur in acetone.These sulphides 2 are to be obtained also directly from methylene bis-diphenylphosphine oxide sulphide 3b and methylene bis-diphenylphosphine disulphide 3d, respectively, under the same olefination conditions.But the yields are smaller and the purification of the raw products is much more difficult, if 3d is used.
