While the archetypal free phosphinidene, H‐P, has been studied for over a century, reports on uncomplexed, univalent phosphorus compounds are very sparse. Here we demonstrate production of HCCP in solid argon through the UV‐induced rearrangement and subsequent dehydrogenation of phosphapropyne, CH3CP. Migration of H atoms along the CCP backbone of CH3CP resulted in production of the previously unobserved
Cycloalkylphosphonates 5 with ring size varying from 4 to 6 were synthesized in good overall yields, in two steps from trichloromethylphosphonates and Ï-dibromoalkanes, via the corresponding α-trimethylsilyl cycloalkylphosphonates 4.
One-pot and efficient electrosynthesis of cycloalkylphosphonates from diisopropyl trichloromethylphosphonate using magnesium electrochemical activation
Various diisopropyl cycloalkylphosphonates were easily prepared in an one-pot sequence under mild conditions, by electrolysing diisopropyltrichloromethylphosphonate in the presence of ω,ω-dibromoalkanes. The use of an electrochemicalactivatedmagnesium amode significantly improved the rate and the yield of the two first steps of the reaction.
The diastereoselective electrosynthesis of polysubstituted a-chloro cyclopropylphosphonates is efficiently achieved by electroreduction of diisopropropyl trichloromethylphosphonate in the presence of Michael accepters, in a one-compartment cell equipped with a magnesium sacrificial anode. (C) 1998 Elsevier Science Ltd. All rights reserved.
Denis, J. M.; Guillemin, J. C.; Guennec, M. Le, Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 49/50, p. 317 - 320