Torquoselective Mechanochemical Activation of the Staudinger Reaction To Form ß-Lactams.
J Org Chem
; 83(4): 2438-2441, 2018 02 16.
Article
em En
| MEDLINE
| ID: mdl-29334463
ABSTRACT
The Staudinger reaction yielding ß-lactam rings via [2 + 2] cycloaddition is a torquoselective reaction where the stereochemistry of the product can be steered by suitable substituents. Although the mechanochemical ring-opening of ß-lactams has been investigated recently, the force-assisted synthesis of this important functional four-ring motif remains unexplored. As it will be computationally demonstrated, mechanochemical activation greatly reduces the barrier of the rate-limiting ring-closure step while, at the same time, preserves its torquoselectivity. This finding strongly suggests that strained four-membered rings can be readily incorporated in chain molecules using sonication techniques that greatly enhance reactivity while conserving selectivity.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article