Reactivity of Low-Valent Iridium, Rhodium, and Platinum Complexes with Di- and Tetrasubstituted Hydrazines
作者:Jessica M. Hoover、John Freudenthal、Forrest E. Michael、James M. Mayer
DOI:10.1021/om701192s
日期:2008.5.1
Rh(NNN)Cl pincer complex catalyzes the disproportionation of PhNHNHPh to azobenzene and aniline with no change in the Rh complex. The reaction of (bpy)PtMe2 with the hydrazine AcNHNHC(O)CH2CH2CH═CH2 (3) yields the platinum metallacycle (bpy)Pt(η2-AcN-NC(O)(CH2)2CHCH2 (4). Although IrCl(PEt3)3, Rh(NNN)Cl, and (NN)PtMe2 all undergo facile oxidative addition of other X−Y bonds, such reactivity is not observed
Platinum-Catalyzed Intramolecular Hydrohydrazination: Evidence for Alkene Insertion into a Pt−N Bond
作者:Jessica M. Hoover、Antonio DiPasquale、James M. Mayer、Forrest E. Michael
DOI:10.1021/ja906563z
日期:2010.4.14
regioisomeric products, only the product of 5-exo cyclization at the proximal nitrogen is formed, without reaction at the distal nitrogen or 6-endo cyclization. The resting states were found to be a 2:1 Pt-amidate complex (25, for N-acetamido) of the deprotonated hydrazide and a Pt-alkyl complex of the cyclized pyrrolidinone (20 for N-phthalimido). Both complexes are catalytically competent. Catalysis using