Low-valent titanium( ii ) mediated intramolecular and regioselective alkyne/alkoxyallene reductive coupling reactions
Résumé
Low-valent titanium(II) complexes turned out to be suitable reagents in the promotion of alkyne/alkoxyallene coupling reactions in an intramolecular fashion. The conditions developed herein led to a broad range of highly functionalized cyclic adducts with excellent regioselectivities toward the central carbon of the alkoxyallene moiety. Good yields (up to 76%) were obtained over 19 examples. One-pot late functionalization by electrophile trapping was also possible and led to excellent diastereoselectivities (up to 95/5 d.r.).
Domaines
ChimieOrigine | Fichiers produits par l'(les) auteur(s) |
---|