Light‐ and Manganese‐Initiated Borylation of Aryl Diazonium Salts: Mechanistic Insight on the Ultrafast Time‐Scale Revealed by Time‐Resolved Spectroscopic Analysis
作者:James D. Firth、L. Anders Hammarback、Thomas J. Burden、Jonathan B. Eastwood、James R. Donald、Chris S. Horbaczewskyj、Matthew T. McRobie、Adam Tramaseur、Ian P. Clark、Michael Towrie、Alan Robinson、Jean‐Philippe Krieger、Jason M. Lynam、Ian J. S. Fairlamb
DOI:10.1002/chem.202004568
日期:2021.2.24
Manganese‐mediated borylation of aryl/heteroaryldiazoniumsalts emerges as a general and versatile synthetic methodology for the synthesis of the corresponding boronate esters. The reaction proved an ideal testing ground for delineating the Mn species responsible for the photochemical reaction processes, that is, involving either Mn radical or Mn cationic species, which is dependent on the presence
Rh/Pd Catalysis with Chiral and Achiral Ligands: Domino Synthesis of Aza-Dihydrodibenzoxepines
作者:Adam A. Friedman、Jane Panteleev、Jennifer Tsoung、Vaizanne Huynh、Mark Lautens
DOI:10.1002/anie.201303659
日期:2013.9.9
A game of dominoes: A synthetic route to aza‐dihydrodibenzoxepines is described, through the combination of a Rh‐catalyzed arylation and a Pd‐catalyzed C‐O coupling in a single pot. For the first time, the ability to incorporate a chiral and an achiralligand in a two‐component, two‐metal transformation is achieved, giving the products in moderate to good yields, with excellent enantioselectivities
Regioselective Synthesis of <i>o</i>-Benzenediboronic Acids via Ir-Catalyzed <i>o</i>-C–H Borylation Directed by a Pyrazolylaniline-Modified Boronyl Group
Ir-catalyzed ortho-directed C–H borylation of pyrazolylaniline (PZA)-modified arylboronic acids with bis(pinacolate)diboron afforded o-benzenediboronic acids in which two boronyl groups are differentially modified by pinacol (PIN) and PZA. By using this borylation after nondirected Ir-catalyzed C–H borylation, o-benzenediboronic acids are conveniently synthesized from unfunctionalized arenes. The differentially
[EN] SOLUBLE GUANYLATE CYCLASE ACTIVATORS<br/>[FR] ACTIVATEURS DE GUANYLATE CYCLASE SOLUBLE
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2013025425A1
公开(公告)日:2013-02-21
The present invention relates to compounds of formula (I), and pharmaceutically acceptable salts thereof, wherein R1 - R5 and n are as defined herein. The invention also relates to pharmaceutical compositions comprising these compounds, methods of using these compounds in the treatment of various diseases and disorders, processes for preparing these compounds and intermediates useful in these processes.
Use of 2-Bromophenylboronic Esters as Benzyne Precursors in the Pd-Catalyzed Synthesis of Triphenylenes
作者:José-Antonio García-López、Michael F. Greaney
DOI:10.1021/ol5006246
日期:2014.5.2
aryl boronates are introduced as aryne precursors for transition-metal-catalyzed transformations. On treatment with tBuOK and Pd(0), metal-bound aryne intermediates are formed that undergo effective trimerization to form useful triphenylene compounds. For meta-substituted arynes, the 3:1 product ratio in favor of non-C3 symmetric material is indicative of a benzyne mechanism.