Silver-mediated fluorination of potassium aryltrifluoroborates with Selectfluor®
摘要:
A simple and practical procedure for the silver-mediated fluorination of aryl- and heteroaryltrifluoroborates with electrophilic fluorine from Selectfluor (R) and LiOH center dot H2O is presented. The reaction procedure is simple and easy to set up, the process produces fluorinated arenes and heteroarenes in good to excellent yields and a wide range of electronically and structurally diverse substrates are tolerated. (C) 2014 Elsevier Ltd. All rights reserved.
Pd(ii)-catalyzed decarboxylative cross-coupling of oxamic acids with potassium phenyltrifluoroborates under mild conditions
作者:Mingzong Li、Cong Wang、Ping Fang、Haibo Ge
DOI:10.1039/c1cc11635e
日期:——
A novel Pd-catalyzed decarboxylative cross-coupling of oxamic acids with potassium phenyltrifluoroborates has been realized under mild reaction conditions. This method provides an efficient access to N-mono- or N,N-disubstituted benzamides and benzoates.
For the first time the room-temperature rhodium-catalyzedasymmetric1,4-addition of potassium aryltrifluoroborates to α,β-unsaturated substrates is described. Thanks to the use of a chiral diene as ligand for rhodium and triethylamine as base, to facilitate transmetalation of the boron species, high yields and enantioselectivities were generally achieved. Moreover, the use of such tetravalent boron
A direct cross-coupling reaction of aromatic aldehydes with potassiumtrifluoro(organo)borates afforded ketones in high yields and under mild conditions in the presence of a rhodium catalyst and acetone. This new reaction, involving a formal aldehyde C-H bond activation, is believed to proceed via a Heck-type mechanism followed by hydride transfer to acetone.
Total synthesis and dual PPARα/γ agonist effects of Amorphastilbol and its synthetic derivatives
作者:Taejung Kim、Woojung Lee、Kyu Hyuk Jeong、Jung Ho Song、Soon-Hye Park、Pilju Choi、Su-Nam Kim、Seokjoon Lee、Jungyeob Ham
DOI:10.1016/j.bmcl.2012.04.062
日期:2012.6
extract, is a biologically interesting natural trans-stilbene compound with dual peroxisome proliferator-activated receptor (PPAR) α/γ agonist activity. After total synthesis of APH-1 and its derivatives by Pd-catalyzed Suzuki–Miyaura cross-coupling of a common (E)-styryl bromide intermediate and various aromatic trifluoroborate compounds, we biologicallyevaluated APH-2–APH-12 for PPAR agonist activity
Pd-Catalysed Suzuki coupling of α-bromoethenylphosphonates with organotrifluoroborates: a general protocol for the synthesis of terminal α-substituted vinylphosphonates
and robust protocol for the synthesis of terminal α-substituted vinylphosphonates via Suzuki coupling of α-bromovinylphosphonates with organotrifluoroborates has been successfully developed. This method features broad substrate scope, great functional group compatibilities, and easy scale-up ability. In addition to easy access of nucleophiles, straightforwardsynthesis of electrophiles was also realized