<i>N</i>-Methoxy-<i>N</i>-methylcyanoformamide, a Highly Reactive Reagent for the Formation of β-Keto Weinreb Amides and Unsymmetrical Ketones
作者:Jeremy Nugent、Brett D. Schwartz
DOI:10.1021/acs.orglett.6b01844
日期:2016.8.5
N-methoxy-N-methylcarbamoylimidazole, is reported. This reagent enables the one-pot preparation of β-carbonyl Weinreb amides from lithium enolates, one-carbon homologated Weinreb amides, and unsymmetrical ketones in one-pot procedures from various organometallic species.
Carbamoylimidazolium and thiocarbamoylimidazolium salts: novel reagents for the synthesis of ureas, thioureas, carbamates, thiocarbamates and amides
作者:Justyna A. Grzyb、Ming Shen、Chiaki Yoshina-Ishii、W. Chi、R.Stanley Brown、Robert A. Batey
DOI:10.1016/j.tet.2005.05.056
日期:2005.7
Carbamoylimidazolium salts act as efficient N,N-disubstituted carbamoylating reagents. These salts are readily prepared by the sequential treatment of secondary amines with N,N′-carbonyldiimidazole (CDI) and iodomethane. The carbamoylimidazolium salts are more efficient carbamoyl transfer reagents than the intermediate carbamoylimidazoles, as a result of the ‘imidazolium’ effect. Kinetic studies on
Synthesis and antimalarial evaluation of amide and urea derivatives based on the thiaplakortone A natural product scaffold
作者:Brett D. Schwartz、Tina S. Skinner-Adams、Katherine T. Andrews、Mark J. Coster、Michael D. Edstein、Donna MacKenzie、Susan A. Charman、Maria Koltun、Scott Blundell、Anna Campbell、Rebecca H. Pouwer、Ronald J. Quinn、Karren D. Beattie、Peter C. Healy、Rohan A. Davis
DOI:10.1039/c4ob01849d
日期:——
A series of amide and urea analogues based on the thiaplakortone A natural product scaffold were synthesised and screened forin vitroantimalarial activity.
作者:Stephen T. Heller、James N. Newton、Tingting Fu、Richmond Sarpong
DOI:10.1002/anie.201502894
日期:2015.8.17
synthesis of unsymmetricalketones utilizing a pyrrole‐bearing carbonyl linchpin reagent (carbonyl linchpin N,O‐dimethylhydroxylamine pyrrole; CLAmP) is reported. In contrast to other carbonyl dielectrophile equivalents, CLAmP enables the synthesis of ketones from a variety of organolithium and Grignard reagents. The electrophilic nature of CLAmP enables the addition of less reactive as well as thermally
Diversification of 6‐bromo‐2‐substituted Pyridine Derivatives
<i>via</i>
Suzuki‐Miyaura Cross‐Coupling
作者:Abigail E. Lambert、Jesse D. Carrick
DOI:10.1002/jhet.3144
日期:2018.5
improvement of molecular performance in the aforementioned areas. The current work describes an efficient catalyst/ligand combination for accessing 2‐acetyl‐ and 2‐procarbonyl substituted pyridines viaSuzuki‐Miyaura cross‐coupling with various organotrifluoroborates. Twenty examples are described with carbonyl and procarbonyl functional groups which afford subsequent access to diversified unsymmetric