Practical Preparation of N-(1-Alkynyl)sulfonamides and Their Remote Diastereoselective Addition to Aldehydes via Titanation
摘要:
Aliphatic and aromatic suffonamides were alkynylated with 1-bromo-1-alkynes in the catalytic presence of Cul to give N-(1-alkynyl)sulfonamides in good to excellent yields. The acetylene-titanium complexes generated from N-(1-alkynyl)benzosultams underwent diastereoselective addition to aldehydes.