1845-54-1Relevant articles and documents
Approaches to selective isoprenologation via reactions of (η3-allyl)Fe(CO)4+ with allyl nucleophiles
Li, Zhong,Nicholas, Kenneth M.
, p. 105 - 112 (2007/10/02)
The reactions of substituted (η3-allyl)Fe(CO)4BF4 complexes 1 with various allyl-metals and dienolate derivatives have been investigated in search of a method for regio- and stereocontrolled allyl-allyl coupling.All three classes of allyl derivatives react with 1 in moderate to good yield with variable regioselectivity; the silyl derivatives 2 generally provide good regioselectivity for attack at the less substituted terminus of unsymmetrical derivatives of 1 but deprotonation of the 1,1-dimethylallyl complex 1e prevents efficient isoprenylation.Although deprotonation of 1e also dominates with the siloxydienes, the lithium dienolates couple efficiently with 1; however, reaction at the α position of the dienolate dominates.
Carbon-Carbon Bond Formation at the γ-Position of Dienolates via the Germanium Masked Dienolates
Yamamoto, Yoshinori,Hatsuya, Satoshi,Yamada, Jun-ichi
, p. 1639 - 1640 (2007/10/02)
Trapping of the lithium dienolate (1), derived from 3-methyl-2-butenoate, with Me3GeX (X = Br or Cl gives the α-germylated derivative (2), which reacts with various electrophiles at the γ-position.
Regioselective Head-to-tail Coupling of Allylic Trialkylstannanes with Allylic Halides under High Pressure
Yamamoto, Yoshinori,Maruyama, Kazuhiro,Matsumoto, Kiyoshi
, p. 548 - 549 (2007/10/02)
Allylic trialkylstannanes (1) regioselectively react with allylic halides (2) at room temperature under high pressure (10 kbar) to give head-to-tail coupling products (3) in high yields.
