or amides can be synthesized in a single step by a carbonylative coupling of α-chloroimines with alcohols or amines under Pd-catalysis. The methodology has been also applied to the preparation of heteroaryl acetic acid derivatives starting from chloromethyl heteroaromatic rings containing a CN double bond. The in situ generation of a β-imino acylpalladium species has been proposed as a key step for
A novel electrophilic-type trifluoromethylthiolation reagent, a trifluoromethanesulfonyl hypervalentiodoniumylide, was designed and reacted well with various nucleophiles to afford the desired CF3S-substituted products. In situ reduction of the trifluoromethanesulfonyl group to give the trifluoromethylthio group, which is the key step in this process, was realized in the presence of copper(I) chloride
Silica Gel‐mediated Synthesis of β‐Enamino Esters and its Application for the Synthesis of Indeno 4‐Hydroxypyridin‐2(1H)‐Ones
作者:Soong‐Hyun Kim、Seri Bae、Eun Bi Ko、Ga Young Park、Eunhye Lee、Hee Jong Hwang、Chun Young Im、Minsoo Song
DOI:10.1002/bkcs.11676
日期:2019.3
The full scope of SiO2‐based condensation of aliphatic or aromatic amines and β‐keto esters to give β‐enamino esters was examined. Functionalized linear β‐enamino esters were easily obtained from SiO2‐based condensation of β‐keto esters and amines only after simple filtration. It was also demonstrated that cyclic β‐enamino esters with 99% purity can be prepared in a practically large scale (60 g) without
<i>in</i>
<i>situ</i>
Formation of RSCl/ArSeCl and Their Oxidative Coupling with Enaminone Derivatives Under Transition‐metal Free Conditions
作者:Zhenhua Shang、Qingyu Chen、Linlin Xing、Yilin Zhang、Laura Wait、Yunfei Du
DOI:10.1002/adsc.201900940
日期:2019.11.5
The reaction of diorganyl disulfides or diselenides with PhICl2 in DMF at room temperature led to the in situ formation of the reactive organosulfenyl chloride (RSCl) or selenenyl chloride (ArSeCl), which reacted with enaminone compounds to afford a series of α‐thioenaminones or α‐selenylenaminones, respectively, including the bioactive inhibitor for Cdc25B and its analogue, via the intermolecular