The Directed Ortho Metalation−Ullmann Connection. A New Cu(I)-Catalyzed Variant for the Synthesis of Substituted Diaryl Ethers
作者:Alexey V. Kalinin、Justin F. Bower、Peter Riebel、Victor Snieckus
DOI:10.1021/jo990114x
日期:1999.4.1
Selective <i>Ortho</i> and Benzylic Functionalization of Secondary and Tertiary <i>p</i>-Tolylsulfonamides. <i>Ipso</i>-Bromo Desilylation and Suzuki Cross-Coupling Reactions
作者:Stephen L. MacNeil、O. B. Familoni、Victor Snieckus
DOI:10.1021/jo001402s
日期:2001.6.1
Kinetic vs thermodynamic deprotonation studies on secondary and tertiary sulfonamides 1 and 2 using n-BuLi have been carried out. While both 1 and 2 show kinetic ortho-metalation, thermodynamic conditions lead to ortho and benzylic deprotonation, respectively (Figures 1 and 2). Metalation of 1 using the n-BuLi/KOtBu superbase led to regioselective benzylic metalation (Figure 4); LDA deprotonation was