Palladium catalysed direct allylation of pronucleophiles with allylstannanes
作者:Yoshinori Yamamoto、Naoya Fujiwara
DOI:10.1039/c39950002013
日期:——
The reaction of pronucleophiles 1 with allyltributylstannanes in the presence of catalytic amounts of Pd2(dba)3·CHCl3(4 mol%) and 1,2-bis(diphenylphosphino)ethane (dppe)(10 mol%) at room temperature gives the corresponding allylation products in good to high yields.
Microwave mediated palladium-catalysed reactions on potassium fluoride/alumina without use of solvent
作者:Didier Villemin、Fredéric Caillot
DOI:10.1016/s0040-4039(00)02027-x
日期:2001.1
Potassiumfluoride on alumina was used in palladium-catalysed reactions (Suzuki, Heck, Stille, Trost–Tsuji) without solvent under mono-mode microwave irradiation. Some reactions took place in air. The organotin residue in the Stille reaction remained on the solid support.
Green and Scalable Palladium-on-Carbon-Catalyzed Tsuji-Trost Coupling Reaction Using an Efficient and Continuous Flow System
作者:Clément Cazorla、Muriel Billamboz、Hervé Bricout、Eric Monflier、Christophe Len
DOI:10.1002/ejoc.201601311
日期:2017.2.10
continuous flow Tsuji-Trost coupling reaction between allylic compounds and various nucleophiles was successfully achieved within only ca. 40 s during the single-pass through a cartridge filled with palladium on carbon (Pd/C). Two methods have been designed using the H-cube ThalesNano technology and enable the efficient production of add-valued compounds in the gramm-scale with high productivity. Under
Synthesis of Valuable Chiral Intermediates by Isolated Ketoreductases: Application in the Synthesis of α-Alkyl-β-hydroxy Ketones and 1,3-Diols
作者:Dimitris Kalaitzakis、J. David Rozzell、Ioulia Smonou、Spiros Kambourakis
DOI:10.1002/adsc.200606185
日期:2006.9
and in two examples both ketones were reduced to the 1,3-diol. By replacing the α-alkyl substituent with the OAc group, 1-keto-2,3-diols, as well as 1,2,3-triols were synthesized in high optical purities. These enzymatic reactions provide a simple, highly stereoselective and quantitative method for the synthesis of different diastereomers of valuable chiralsynthonsfrom non-chiral, easily accessible
Enantio- and Diastereoselective Synthesis of Functionalized Carbocycles by Cu-Catalyzed Borylative Cyclization of Alkynes with Ketones
作者:Joseph M. Zanghi、Shuang Liu、Simon J. Meek
DOI:10.1021/acs.orglett.9b01769
日期:2019.7.5
and diastereoselective tandem hydroboration/borylative cyclization of alkynes with ketones for the synthesis of carbocycles is reported. The reaction proceeds via desymmetrization and generates four contiguous stereocenters, including an all-carbonquaternarycenter. The method provides rapid access to [6,5]- and [5,5]-bicycles and cyclopentane products. Catalyst-controlled diastereoselectivity by selection