Gold(I)-Catalyzed Ring-Expanding Spiroannulation of Cyclopropenones with Enynes
摘要:
The gold(I)-catalyzed ring-expanding spiroannulation of cyclopropenones with enynes is reported here. A molecule of water is incorporated into the products during the spiroannulation to afford spirocyclic cyclopentenones containing an alcohol functionality.
Gold(I)-Catalyzed Ring-Expanding Spiroannulation of Cyclopropenones with Enynes
摘要:
The gold(I)-catalyzed ring-expanding spiroannulation of cyclopropenones with enynes is reported here. A molecule of water is incorporated into the products during the spiroannulation to afford spirocyclic cyclopentenones containing an alcohol functionality.
of a 3-[(3-methylbut-2-enylamino)methyl]but-3-en-1-ol derivative with aldehydes in the presence of TMSOTf at 0 °C under mild conditions provides the corresponding spiropyrrolidine scaffolds in good yields. Similar cyclization of a 3-[(4-methylpent-3-enylamino)methyl]but-3-en-1-ol derivative with aldehydes affords the correponding spiropiperidine compounds. This is a new approach for the construction