Transposition des bromo-2 benzopropionates d'ethyle, substitues en α par un groupe acetyl ou cyano, en acetyl-2 et cyano-2 benzopropionate d'ethyle。合成这些 d'oxo-3 cyclanecarboxylates d'alkyle a partir de β-cetoesters; 例如,l'iodomethyl-2 oxo-2 cyclopentanecarboxylate d'ethyle 导管 a l'oxo-3 cyclohexcarboxylate d'ethyle
Metal free stannyl anion generated from Bu3SnSiMe3 and R4NX in DMF reacted with an aryl or vinyl halide to produce the aryl or vinyl anion via so-called halogen-metal exchange process, which reacted with internal carbonyl group to afford cyclized product in good yield.
Novel cyclization by stannyl anion generated from (trimethylsilyl)tributylstannane (Me3SiSnBu3) and fluoride ion. Application to natural product synthesis
Stannyl anion, generated from Me3SiSnBu3 and (Et2N)3S+TMSF2- (TASF) or CsF in DMF, was quite effective for generation of an aryl or vinyl anion, which reacted with a carbonyl group intramolecularly to provide the useful cyclized product in good yield.
Booth, Susan E.; Jenkins, Paul R.; Swain, Christopher J., Journal of the Chemical Society. Perkin transactions I, 1994, # 23, p. 3499 - 3508
作者:Booth, Susan E.、Jenkins, Paul R.、Swain, Christopher J.、Sweeney, Joseph B.
A metal free stannyl anion generated from Me3SiSnBu3 and R4NX in DMF reacted with an aryl halide bearing carbonyl group to produce an aryl anion via the so-called halogen-metal exchange process, which reacted with a carbonyl group to afford a cyclized product in good yield.
BECKWITH, ATHELSTAN L. J.;OSHEA, DENNIS M.;WESTWOOD, STEVEN W., J. AMER. CHEM. SOC., 110,(1988) N 8, 2565-2575
作者:BECKWITH, ATHELSTAN L. J.、OSHEA, DENNIS M.、WESTWOOD, STEVEN W.