The Selective Deiodination of Iodoheterocycles Using the PhSiH3 – In(OAc)3 System
摘要:
Nitrogen-containing pi-deficient heterocyclic iodides such as iodoquinolines or iodopyridines were deiodinated by treatment with phenylsilane catalyzed by indium acetate to give the corresponding deiodinated heterocycles at ambient temperature.
Synthesis of Pyridylsulfonium Salts and Their Application in the Formation of Functionalized Bipyridines
作者:Vincent K. Duong、Alexandra M. Horan、Eoghan M. McGarrigle
DOI:10.1021/acs.orglett.0c03048
日期:2020.11.6
arylation of pyridylsulfides with good functional group tolerance was developed. To demonstrate synthetic utility, the resulting pyridylsulfonium salts were used in a scalable transition-metal-free coupling protocol, yielding functionalizedbipyridines with extensive functional group tolerance. This modular methodology permits selective introduction of functional groups from commercially available pyridyl
Synthesis of Chemically and Configurationally Stable Monofluoro Acylboronates: Effect of Ligand Structure on their Formation, Properties, and Reactivities
作者:Hidetoshi Noda、Jeffrey W. Bode
DOI:10.1021/jacs.5b00822
日期:2015.3.25
tetravalent, configurationally stable B-chiral acylboronates. Significantly, the ligands on the boronate allow for fine-tuning of the properties and reactivity of acylboronates. In amide-formingligation with hydroxylamines under aqueous conditions, a considerable difference in reactivity was observed as a function of ligand structure. The solid-state structures suggested that subtle steric and conformational
The aromatic perfluoroalkylation catalyzed by a copper(I) salt with bis(perfluoroalkyl)zinc reagents Zn(RF)2(DMPU)2, which were prepared and then isolated as a stable white powder from perfluoroalkyl iodide and diethylzinc, was accomplished to provide the perfluoroalkylated products in good‐to‐excellent yields. The advantages of this reliable and practical catalytic reaction are 1) air‐stable and easy‐to‐handle
Lithium trihydroxy/triisopropoxy-2-pyridylborate salts (LTBS): synthesis, isolation, and use in modified Suzuki–Miyaura cross-coupling reactions
作者:Kuanchiang Chen、Richard Peterson、Shivanand K. Math、James B. LaMunyon、Charles A. Testa、Dustin R. Cefalo
DOI:10.1016/j.tetlet.2012.06.145
日期:2012.9
and triisopropoxy 2-borate salts (LTBS) for use in modified Suzuki–Miyauracross-coupling reactions that can be produced in quantities greater than one hundred grams. Pyridyl LTBS provide a viable cross-coupling alternative to unstable 2-pyridylboronic acids, boronates, and trifluoroborate salt derivatives. We also demonstrate the synthesis and cross-coupling of shelf-stable LTBS reagents of other sp2-hybridized
Lipshutz-type bis(amido)argentates for directed <i>ortho</i> argentation
作者:Noriyuki Tezuka、Keiichi Hirano、Andrew J. Peel、Andrew E. H. Wheatley、Kazunori Miyamoto、Masanobu Uchiyama
DOI:10.1039/c9sc06060j
日期:——
aromatic functionalization via unprecedented directed ortho argentation (DoAg). X-Ray crystallographic analysis showed that 3 takes a structure analogous to that of the corresponding Lipshutz cuprate. DoAg with this TMP-Ag-ate afforded multifunctional aromatics in high yields in processes that exhibited high chemoselectivity and compatibility with a wide range of functional groups. These included organometallics-
双(酰胺基)银盐(TMP)2 Ag(CN)Li 2(3,TMP-Ag-酸盐; TMP = 2,2,6,6-四甲基哌啶子基)被设计为通过空前的定向原位化学键进行化学选择性芳族官能化的工具(D o Ag)。X射线晶体学分析表明3具有与相应的Lipshutz铜酸盐类似的结构。d Ø具有这种TMP-Ag-酸酯的Ag在具有高化学选择性和与各种官能团相容性的工艺中,以高收率提供了多官能芳烃。这些包括对有机金属和过渡金属敏感的取代基,例如甲酯,醛,乙烯基,碘,(三氟甲磺酰基)氧基和硝基。白蚁类药物与各种亲电试剂显示出良好的反应性。硫属元素(S,Se和Te)的安装和偶氮偶合反应也有效进行。