The Tetraethylphosphorodiamidate (OP(O)(NEt2)2) Directed Metalation Group (DMG). Directed ortho and Lateral Metalation and the Phospha Anionic Fries Rearrangement.
Org Lett
; 22(6): 2147-2151, 2020 Mar 20.
Article
em En
| MEDLINE
| ID: mdl-32125164
ABSTRACT
We report on the tetraethylphosphorodiamidate (-OP(O)(NEt2)2) group as an effective directed metalation group (DMG). Lithiation-electrophile quench of 1 provides a general synthesis of ortho-substituted aryl and naphthyl phosphorodiamidates 4-8. We also describe the phospha anionic ortho-Fries (AoF) rearrangement of the phosphorodiamidates 1a,1bâ¯â 2 or 3 and its vinylogous counterpart to the ortho-tolyl phosphorodiamidates 5bâ¯â 13. Intermolecular competition experiments demonstrate the approximately equal DMG strength of the -OP(O)(NEt2)2 and the most powerful OCONEt2 groups.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article