"Enantiomerically Pure Axially Chiral Aminocarbene Complexes of Chromium"@en . . . "27" . "Enantiomern\u011B \u010Dist\u00E9 axi\u00E1ln\u011B chir\u00E1ln\u00ED aminokarbenov\u00E9 komplexy chromu"@cs . "Draho\u0148ovsk\u00FD, Du\u0161an" . . . "Enantiomerically Pure Axially Chiral Aminocarbene Complexes of Chromium" . "aminokarbene complexes of chromium; axial chirality; enantiomers"@en . "8" . . "P(GA203/00/1240), P(GA203/04/0487), Z(MSM0021620857), Z(MSM6046137301)" . . "9"^^ . . "0276-7333" . "Aminokarbenov\u00E9 komplexy chromu nesouc\u00ED methylovou skupinu v o-poloze aromatick\u00E9ho kruhu byly roz\u0161t\u011Bpeny na enentiomery."@cs . . "22310" . "Meca, Lud\u011Bk" . "RIV/60461373:22310/08:00020041!RIV09-MSM-22310___" . . "Aminocarbene complexes having a methyl group in the o-position to the aminocarbene moiety on the aromatic ring, (S)-pentacarbonyl[(N,N-dimethylamino)-(3-methoxycarbonyl-2-methylphenyl)carbene]chromium(0) [(S)-6] and (R)-pentacarbonyl[(N,N-dimethylamino)-(5-methoxycarbonyl-2-methylphenyl)carbene]chromium(0) [(R)-7] were prepared in enantiomerically pure form by the crystallization of diastereoisomeric esters with (S)-1-(1-naphthyl)ethanol. In the case of (S)-6 the racemization barrier DG?rac=(121 ? 0.5) kJxmol-1 was established. The substitution of o-methyl group with isopropyl group did not virtually change the racemization barrier (DG?rac= (120.5 ? 0.5) kJxmol-1), while the introduction of o-phenyl group led to substantial lowering of DG?rac. Attempts to transfer chirality in thermal reactions of the complexes (S)-6 and (R)-7 with alkynes, palladium-catalyzed insertion into C-H bond and photochemical formation of b-lactams were unsuccessful." . "Enantiomern\u011B \u010Dist\u00E9 axi\u00E1ln\u011B chir\u00E1ln\u00ED aminokarbenov\u00E9 komplexy chromu"@cs . "3"^^ . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Dvo\u0159\u00E1k, Dalimil" . . "RIV/60461373:22310/08:00020041" . "C\u00EDsa\u0159ov\u00E1, Ivana" . . "[92D48DEFF86C]" . . . "Aminocarbene complexes having a methyl group in the o-position to the aminocarbene moiety on the aromatic ring, (S)-pentacarbonyl[(N,N-dimethylamino)-(3-methoxycarbonyl-2-methylphenyl)carbene]chromium(0) [(S)-6] and (R)-pentacarbonyl[(N,N-dimethylamino)-(5-methoxycarbonyl-2-methylphenyl)carbene]chromium(0) [(R)-7] were prepared in enantiomerically pure form by the crystallization of diastereoisomeric esters with (S)-1-(1-naphthyl)ethanol. In the case of (S)-6 the racemization barrier DG?rac=(121 ? 0.5) kJxmol-1 was established. The substitution of o-methyl group with isopropyl group did not virtually change the racemization barrier (DG?rac= (120.5 ? 0.5) kJxmol-1), while the introduction of o-phenyl group led to substantial lowering of DG?rac. Attempts to transfer chirality in thermal reactions of the complexes (S)-6 and (R)-7 with alkynes, palladium-catalyzed insertion into C-H bond and photochemical formation of b-lactams were unsuccessful."@en . "4"^^ . "366119" . "Organometallics" . . "Enantiomerically Pure Axially Chiral Aminocarbene Complexes of Chromium" . "Enantiomerically Pure Axially Chiral Aminocarbene Complexes of Chromium"@en . . . . . . . "000254981000026" .