A Fe<sub>3</sub>
O<sub>4</sub>
@SiO<sub>2</sub>
/Schiff Base/Pd Complex as an Efficient Heterogeneous and Recyclable Nanocatalyst for One-Pot Domino Synthesis of Carbamates and Unsymmetrical Ureas
作者:Iman Dindarloo Inaloo、Sahar Majnooni
DOI:10.1002/ejoc.201901140
日期:2019.10.9
A palladium‐catalyzed domino method for the direct synthesis of carbamates and ureas has been developed by using readily available and economical starting materials (arylhalide, carbon monoxide, sodium azide, amines, and alcohols) in a one‐pot approach. This efficient and phosgene‐free process provided an inexpensive and attractive route to synthesize the products in good to excellent yields.
Synthesis of Chiral α-CF<sub>3</sub>-Substituted Benzhydryls via Cross-Coupling Reaction of Aryltitanates
作者:Andrii Varenikov、Evgeny Shapiro、Mark Gandelman
DOI:10.1021/acs.orglett.0c03673
日期:2020.12.4
We describe a highly efficient approach toward α-CF3-substituted benzhydryls thanks to the employment of organotitanium(IV) based nucleophiles. The use of commercially available anesthetic halothane as a cheap fluorinated building block in a sequential one-pot nickel-catalyzed enantioselective cross-coupling reaction of aryl titanates allowed for the synthesis of chiral α-CF3-substituted benzhydryls
Mizoroki–Heck alkenylations and arylations of protected aminocyclopentenes, prepared in a few steps from Vince lactam, afforded functionalized cyclopentenes in high yields and stereoselectivities. DFT calculations were performed to rationalize the high diastereoselectivities. Functionalized cyclopentene products were transformed into valuable chiral building blocks, such as cyclic γ-amino acids and carbocyclic
Alkyl Carbagermatrane Enabled Synthesis of Seven-Membered Carbocycle-Fused Aromatics through Catellani Strategy
作者:Xiu-Ying Xie、Wei-Tao Jiang、Bin Xiao
DOI:10.1055/s-0040-1720693
日期:2021.8
seven-membered carbocycle-fused aromatics was realized by Catellani reaction using terminally brominated alkyl carbagermatranes through intermolecular cyclization manner. Various functional groups were well tolerated, and this transformation was also expanded to the synthesis of carbocycles of other size. The utility of this method was demonstrated by modification of natural product derivatives and