Combined Directed ortho Metalation/Suzuki−Miyaura Cross-Coupling Strategies. Regiospecific Synthesis of Chlorodihydroxybiphenyls and Polychlorinated Biphenyls
摘要:
The Directed ortho Metalation (DoM)/Suzuki-Miyaura cross-coupling strategy is applied for the regiospecific construction of all isomeric monochloro and selected dichloro and trichloro 2,3-dihydroxybiphenyls (DHBs). The combined methodology highlights iterative DoM processes, hindered Suzuki-Miyaura couplings, and advantages in diversity in approaches from commercial starting materials leading to provision of chloro-DHBs as single isomers in high purity and on a gram scale. The syntheis of several PCBs are also reported.
Directed ortho-metalation and Suzuki–Miyaura cross-coupling connections: regiospecific synthesis of all isomeric chlorodihydroxybiphenyls for microbial degradation studies of PCBs
作者:S. Nerdinger、R. Marchhart、P. Riebel、C. Kendall、M. R. Johnson、C.-F. Yin、V. Snieckus、L. D. Eltis
DOI:10.1039/a907279i
日期:——
Monochloro DHBs 1aâd and 2aâc have been regioselectively synthesised in good overall yields by a combination of directed ortho metalation and SuzukiâMiyaura cross-coupling.
The present invention is directed to novel catechol diether compounds, pharmaceutical compositions therefrom and methods for inhibiting reverse transcriptase and treating HIV infections, especially included drug resistant strains of HIV 1 and 2 and/or secondary disease states and/or conditions which occur as a consequence of HIV infection.