Ligand Effects in the Synthesis of N-Heterocycles by Intramolecular Heck Reactions
摘要:
Chemo- and regioselectivity of intramolecular Heck reactions are dependent on the type of ligand employed. Six- to eight-membered benzolactarns are produced in good yields using PPh3 as ligand. In contrast, a biaryl coupling occur-red preferentially under ligandless conditions to form a dihydrophenanthridine product. Conformations of the seven- and eight-membered benzolactarns in the solid state were examined by X-ray crystallography.
Ligand Effects in the Synthesis of N-Heterocycles by Intramolecular Heck Reactions
摘要:
Chemo- and regioselectivity of intramolecular Heck reactions are dependent on the type of ligand employed. Six- to eight-membered benzolactarns are produced in good yields using PPh3 as ligand. In contrast, a biaryl coupling occur-red preferentially under ligandless conditions to form a dihydrophenanthridine product. Conformations of the seven- and eight-membered benzolactarns in the solid state were examined by X-ray crystallography.