238097-27-3Relevant academic research and scientific papers
Reactions of Complex Ligands Part 84. Chiral Diene-dienophile-functionalzed Aminocarbene Complexes of Molybdenum: Synthesis and Intramolecular Diels-Alder Reaction
Doetz, K. H.,Boettcher, D.,Jendro, M.
, p. 34 - 41 (1999)
Chiral at metal carbene complexes (η5-C5H5)(CO)(NO)Mo=C[C(CH3)=CH2(NRCH2)(2-CH3O)] 2-4 have been synthesized from (η5-C5H5)Mo(CO)2NO via a nucleophilic addition/alkylation/aminolysis sequence. In contrast to 2 (R=H), the N-alkylated analogs 3 and 4 undergo intramolecular Diels-Alder reaction upon warming to give the isoindole derivatives 6 and 7 with moderate diastereoselection. These molybdenum carbenes cyclise more readily than their isolobal analogous methacrylic amides, but they are less reactive than their analogs containing a [η5-C5(CH3)H4](CO)2Mn or a (CO)5W fragment. This sequence reflects the increasing electron-withdrawing ability of the metal coligand moiety in the order of the molybdenum manganese tungsten coligand fragments.
