ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Organic Synthesis via Transition Metal Complexes, 33. - 2-Azaallenyl Chromium Complexes by Condensation of Aminocarbene Chromium Complexes with Aldehydes, Acid Chlorides, or Acid AmidesAminocarbene complexes LnM = C(NH2)R 1 [LnM = Cr(CO)5, R = C6H5, CH3] can be converted to 2-azaallenyl complexes LnM⊖ [C(R)=N⊕=CXR1] by the condensation of the NH2 group with organic carbonyl compounds O=CYR1 in presence of Et3N and POCl3/Et3N, respectively. The condensation is achieved with a surprisingly wide variety of different carbonyl compounds like aldehydes (Y = H), acid chlorides (Y = Cl), acid amides [Y = N(CH3)2] and leads to the formation of 2-azaallenyl complexes of hitherto unknown substitution patterns [X = H (3), O2CR1 (7), N(CH3)2 (9)]. These have been analysed spectroscopically. 3a was characterized by an X-ray analysis.
Notes:
Aminocarben-Komplexe LnM = C(NH2)R 1 [LnM = Cr(CO)5, R = C6H5, CH3] lassen sich durch Kondensation ihrer NH2-Gruppe mit Carbonylverbindungen O=CYR1 in 2-Azaallenyl-Komplexe LnM⊖ [C(R)=N⊕=CXR1] umwandeln. Die Kondensation gelingt mit Et3N bzw. POCl3/Et3N und einer überraschenden Vielfalt sonst recht unterschiedlich reagierender Carbonylverbindungen, wie Aldehyde (Y = H), Säurechloride (Y = Cl), Säureamide [Y = N(CH3)2]. Es wurden 2-Azaallenyl-Komplexe mit bisher nicht zugänglichen Substitutionsmustern [X = H (3), O2CR1 (7), N(CH3)2 (9)] erhalten und spektroskopisch analysiert. 3a wurde anhand einer Kristallstrukturanalyse charakterisiert.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19891220225
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