Syntheses of cyclic imine complexes of the chiral rhenium Lewis acid [(ν5-C5H5) Re(NO)(PPh3)]+ by hydride ion abstraction from amido complexes

Configurational Equilibria in Amido and Lithioamido Complexes of Formulas (η5-C5H5)Re(NO)(PAr3)(N̈HCHRR‘) and (η5-C5H5)Re(NO)(PAr3)(N̈LiR‘‘): Epimerization Occurs at Rhenium via Phosphine Dissociation

“…Finally, this paper marks the conclusion of our efforts to characterize the structural, configurational, dynamic, and related physical properties of adducts of I and organonitrogen donor ligands. − Studies directed at enantioselective organic syntheses 10-11 remain in progress and will be reported in due course 12b…”

“…General Data. Instrumental protocols and solvent and reagent purifications were identical to those in earlier papers, 9a,c and additional details for much of the following may be found elsewhere . Solvents not specified previously were used as received.…”

“…We have had an ongoing interest in enantioselective and diastereoselective transformations mediated by the chiral rhenium Lewis acid [(η 5 -C 5 H 5 )Re(NO)(PPh 3 )] + ( I ). − Adducts of many types of neutral and anionic Lewis bases are easily prepared in enantiomerically pure form. ,, With neutral Lewis bases, remarkable configurational stabilities have been observed. , No racemization has ever been detected, including many compounds that have been kept for extended periods at elevated temperatures . Most anionic Lewis bases give adducts of similar configurational stabilities …”

“…We have sought to develop applications of I in the enantioselective synthesis of chiral organonitrogen compounds. Toward this end, we have published an extensive series of papers involving adducts of I and various neutral and anionic nitrogen donor ligands. − These have contained several incidental observations of configurationally labile amido complexes. , In this paper, we present a detailed mechanistic study of a representative epimerization. We also describe the generation of adducts of I and lithio amido ligands, −N̈LiR.…”

Synthesis, structural characterization, antimicrobial and cytotoxic effects of aziridine, 2-aminoethylaziridine and azirine complexes of copper(ii) and palladium(ii)

“…26 However, many aziridine complexes of a variety of transition metals with up to four aziridine ligands are currently known, most of which have been published by us. [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] Ring opening reactions especially with functionalized metal carbonyls have also been reported, e.g. with hydrido carbonyl complexes to form β-aminoacyl complexes via M-C addition [42][43][44][45][46] or with halogenido carbonyl complexes to form five-membered aminooxycarbene complexes.…”