1315513-13-3Relevant academic research and scientific papers
Stereoelectronic factors in iron catalysis: Synthesis and characterization of aryl-substituted iron(II) carbonyl P-N-N-P complexes and their use in the asymmetric transfer hydrogenation of ketones
Sues, Peter E.,Lough, Alan J.,Morris, Robert H.
, p. 4418 - 4431 (2011/10/10)
A series of five (S,S)-trans-[Fe(CO)(Br)(PR2-CH 2CH=NCH(Ph)CH(Ph)N=CHCH2-PR2)][X] compounds (1a-c, X = BPh4; 1d,e, X = BF4) were synthesized and tested for the asymmetric transfer hydrogena
New cyclic phosphonium salts derived from the reaction of phosphine-aldehydes with acid
Mikhailine, Alexandre A.,Lagaditis, Paraskevi O.,Sues, Peter E.,Lough, Alan J.,Morris, Robert H.
scheme or table, p. 1824 - 1830 (2010/08/06)
Various cyclic phosphonium structures are formed in high yield by the deprotection of unstable phosphine-aldehydes in acidic solution. When there is a methylene spacer between the phosphine and the aldehyde, a phosphonium ion [PHR2CH2CH(OEt)2]Br2, R=iPrOH, Et is obtained. Reaction of these phosphonium salts with water produces the dimers [-PR2CH2CH(OH)-]2[Br]2?R = iPr, Et. When there is an ethylene spacer as in PPh2CH2CH2CH(OCH2CH2O), a remarkable tetramer with a 16-membered ring [-PPh2CH2CH2CH (OH)-]4[Cl]4 forms as one diastereomer in hydrochloric acid solution. Reaction of HCl with the protected phosphine-aldehyde with a propylene spacer (PPh2CH2CH2CH2CH(OCH2CH2O)) results in the formation of the monomeric phosphonium salt [-PPh2 CH2CH2CH2CH(OH)-]Cl with a 5-membered ring. Solid state structures of different ring types were determined using X-ray diffraction experiment.
