Reactions between trimethylenemethane metal complexes and the carbon–nitrogen double bond: nickel and palladium catalysed synthesis of pyrrolidines
作者:Michael D. Jones、Raymond D. W. Kemmitt
DOI:10.1039/c39860001201
日期:——
The d10 nickelcomplex [NiP(OEt)3}4] catalyses the cycloaddition of trimethylenemethane to the CN doublebond of an imine to afford a high-yield synthesis of 4-methylenepyrrolidines.
d 10镍配合物[Ni P(OEt)3 } 4 ]催化三亚甲基环化成亚胺的C N双键,从而高产率地合成4-亚甲基吡咯烷。
Direct Pd-Catalyzed Cross-Coupling of Functionalized Organoaluminum Reagents
作者:Klaus Groll、Tobias D. Blümke、Andreas Unsinn、Diana Haas、Paul Knochel
DOI:10.1002/anie.201205987
日期:2012.10.29
A handsome couple: Through the use of the simple Pd catalyst [Pd(tmpp)2Cl2] (tmpp=tris(2,4,6‐trimethoxyphenyl)phosphine) and THF/DMF as solvent, various aryl‐, heteroaryl‐, benzyl‐ and alkylaluminum reagents can be readily cross‐coupled with aryl or heteroaryl iodides, bromides, and nonaflates, and in special cases even with chlorides and triflates. This cross‐coupling tolerates free NH2 groups, aldehydes
Investigations on the Migratory Aptitude of Allyl Groups in Aliphatic Carbenium-Ions
脂肪族碳负离子中烯丙基的迁移能力研究
Cyclometalation of dialkylbis(triethylphosphine)platinum(II) complexes: formation of Pt,Pt-bis(triethylphosphine)platinacycloalkanes
作者:Robert DiCosimo、Stephen S. Moore、Allan F. Sowinski、George M. Whitesides
DOI:10.1021/ja00365a024
日期:1982.1
activation for reactions which form fourand five-membered platinacycloalkanes is small (AAG| 4 kcal mol-'); that for reactions which form fourand six-membered rings is smaller (AAG+ 0 kcal mol-t). We identify these values of AAG+ with estimates of the strain energies of these rings, assuming the strain energy of the platinacyclohexane is small. The important conclusion from these studies is that the strain energy
Isoprene has been metalated in tetrahydrofuran with an excess of sterically hindered potassium dialkylamides, prepared by combining equimolar amounts of the corresponding lithium amide and potassium tert-butoxide. Subsequent reaction with oxirane, alkyl bromides, and pivaldehyde gave the expected coupling products in reasonable yields. Coupling with (CH3)2CHCH2CHO and (CH3)2CCHCHO afforded the bark