Gold(I)-Catalyzed 1,3-<i>O</i>-Transposition Reactions: Ynesulfonamides to Ynamides
作者:De-Yao Li、Yin Wei、Min Shi
DOI:10.1002/ejoc.201500604
日期:2015.7
The gold-catalyzed 1,3-O-transpositionreaction of ynesulfonamides provides a practical synthetic protocol for the synthesis of ynamides under mild conditions. This is the first 1,3-O-transposition example of ynesulfonamides in which a heteroatom is attached to the alkynyl terminal. A plausible mechanism is been proposed on the basis of O-18-labeling and control experiments as well as DFT calculation
One-Pot Synthesis of Substituted Benzo[<i>b</i>]furans and Indoles from Dichlorophenols/Dichloroanilines Using a Palladium–Dihydroxyterphenylphosphine Catalyst
Sonogashira coupling of dichlorophenols and terminal alkynes, followed by cyclization and Suzuki–Miyauracoupling in one pot, using a palladium–dihydroxyterphenylphosphine (Cy-DHTP) catalyst. The use of substoichiometric amounts of tetrabutylammonium chloride was effective in accelerating the Suzuki–Miyauracoupling. This protocol was also successfully applied to the one-pot synthesis of disubstituted
二取代的苯并[ b ]呋喃是通过二氯苯酚和末端炔的邻位选择性Sonogashira偶联反应,然后使用钯-二羟基叔苯基膦(Cy-DHTP)催化剂在一个罐中进行环化和Suzuki-Miyaura偶联反应而合成的。亚化学计量的四丁基氯化铵的使用有效地加速了Suzuki-Miyaura偶联。该方案也成功地用于从二氯苯胺衍生物的一锅法合成二取代的吲哚。
Amine organocatalysts for highly <i>ortho</i>-selective chlorination of anilines with sulfuryl chloride
A metal catalyst free approach for regioselective ortho-chlorination of anilines has been developed using a secondary amine as the organocatalyst and sulfuryl chloride as the halogen source under mild conditions. A wide range of substrates were compatible with this catalytic system. In addition, this catalytic protocol has been applied to the efficient synthesis of bioactive compounds and modification
Iodine(III)‐Mediated Electrophilic Chlorination and Catalytic Nitration of
<i>N</i>
‐Tosyl Anilines
作者:Dipak B. Patil、Rocío Gámez‐Montaño、Mario Ordoñez、Melchor Solis‐Santos、J. Oscar C. Jiménez‐Halla、César R. Solorio‐Alvarado
DOI:10.1002/ejoc.202201295
日期:2022.12.19
under mild, non-Brønsted acidic, and operationally easy-to-handle conditions. Under a common synthetic strategy, the synergistic combination of iodine(III) reagents with aluminum salts [AlX3 (X=−Cl,−NO3)] allowed also the accomplishment of the chlorination process. DFT calculations provided the reaction pathway.