3-ALKOXY, THIOALKYL AND AMINO-4-AMINO-6-(SUBSTITUTED)PICOLINATES AND THEIR USE AS HERBICIDES
申请人:Epp Jeffrey B.
公开号:US20130005574A1
公开(公告)日:2013-01-03
3-alkoxy, thioalkyl and amino-4-amino-6-(substituted)picolinic acids having a halogen, alkyl or mono-, di- tri- and tetra-substituted aryl substituents in the 6-position, and their acid derivatives, are herbicides demonstrating a broad spectrum of weed control.
Ligand-Enabled, Iridium-Catalyzed <i>ortho</i>-Borylation of Fluoroarenes
作者:Olena Kuleshova、Sobi Asako、Laurean Ilies
DOI:10.1021/acscatal.1c01206
日期:2021.5.21
borylation of a stoichiometric amount of a fluoroarene with high ortho-selectivity and tolerance of functional groups such as bromide, chloride, ester, ketone, amine, and in situ-borylated hydroxyl. Complex drug molecules such as haloperidol can be selectively borylated ortho to the F atom. The terpyridine ligand undergoes rollover cyclometalation to produce an N,N,C-coordinated iridium complex, which may
C–H Borylation Catalysts that Distinguish Between Similarly Sized Substituents Like Fluorine and Hydrogen
作者:Susanne L. Miller、Ghayoor A. Chotana、Jonathan A. Fritz、Buddhadeb Chattopadhyay、Robert E. Maleczka、Milton R. Smith
DOI:10.1021/acs.orglett.9b02299
日期:2019.8.16
By modifying ligand steric and electronic profiles it is possible to C–H borylate ortho or meta to substituents in aromatic and heteroaromatic compounds, where steric differences between accessible C–H sites are small. Dramatic effects on selectivities between reactions using B2pin2 or 4,4,5,5-tetramethyl-1,3,2-dioxaborolane (HBpin) are described for the first time. Judicious ligand and borane combinations