The effect of electrochemically formed aluminum salts on the electrochemical cyclisation of methyl cinnamate
摘要:
Electrochemical cyclisation of methyl cinnamate with dielectrophiles has been improved by the presence of an aluminum salt which was pre-formed in situ by the electrolysis of a carboxylic acid with a sacrificial aluminum anode. High yields of three, five and six-membered cyclic products have been obtained in the reactions of methyl cinnamate with dichloromethane, 1,3-dibromopropane, and 1,4-dibromobutane. (C) 1999 Elsevier Science Ltd. AU. rights reserved.
Electrophilic Iron Catalyst Paired with a Lithium Cation Enables Selective Functionalization of Non‐Activated Aliphatic C−H Bonds via Metallocarbene Intermediates
Combining an electrophilic iron complex [Fe(F pda)(THF)]2 (3) [F pda=N,N'-bis(pentafluorophenyl)-o-phenylenediamide] with the pre-activation of α-alkyl-substituted α-diazoesters reagents by LiAl(ORF )4 [ORF =(OC(CF3 )3 ] provides unprecedented access to selective iron-catalyzed intramolecular functionalization of strong alkyl C(sp3 )-H bonds. Reactions occur at 25 °C via α-alkyl-metallocarbene intermediates
Cycloalkene Carbonitriles in Rhodium-Catalyzed 1,4-Addition and Formal Synthesis of Vabicaserin
作者:Wojciech J. Dziechciejewski、Regina Weber、Oliver Sowada、Mike M. K. Boysen
DOI:10.1021/acs.orglett.5b01849
日期:2015.9.4
substituents still remain challenging substrates for enantioselectiverhodium-catalyzed1,4-addition. Cycloalkene carbonitriles and carboxylates have been investigated, and a highly diastereo- and enantioselective protocol for 1,4-addition to cyclopentene and cycloheptene carbonitrile has been developed. This new asymmetric transformation was subsequently applied in the asymmetric formal synthesis of the