Amine-Activated Iron Catalysis: Air- and Moisture-Stable Alkene and Alkyne Hydrofunctionalization
作者:Amy J. Challinor、Marc Calin、Gary S. Nichol、Neil B. Carter、Stephen P. Thomas
DOI:10.1002/adsc.201600570
日期:2016.7.28
an air‐ and moisture‐stable iron(II) pre‐catalyst for alkene and alkyne hydrofunctionalization reactions. This amine activation has enabled the highly operationally simple hydrosilylation and hydroboration of alkenes and alkynes using just 0.25–2 mol% iron catalyst and 1–25 mol% amine. Significantly, these reactions proceed in equal yield under both air and inert reaction conditions.
Copper-Catalyzed Chan–Lam Cyclopropylation of Phenols and Azaheterocycles
作者:Joseph Derosa、Miriam L. O’Duill、Matthew Holcomb、Mark N. Boulous、Ryan L. Patman、Fen Wang、Michelle Tran-Dubé、Indrawan McAlpine、Keary M. Engle
DOI:10.1021/acs.joc.7b03100
日期:2018.4.6
Small molecules containing cyclopropane–heteroatom linkages are commonly needed in medicinal chemistry campaigns yet are problematic to prepare using existing methods. To address this issue, a scalable Chan–Lam cyclopropylation reaction using potassium cyclopropyl trifluoroborate has been developed. With phenol nucleophiles, the reaction effects O-cyclopropylation, whereas with 2-pyridones, 2-hydroxybenzimidazoles
the synthesis of novel bioactive pyrazolyl–isoxazoline hybrids from a pyrazolyl-substituted oxime and various substituted allyloxybenzenes, which are easily available, inexpensive starting materials. All the novel synthesized target hybrids were characterized by NMR, IR, and mass spectroscopic techniques. We have employed some of the hybrid materials in anti-bacterial and anti-fungalactivity studies