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.
Synthesis of benzocyclic ketones via palladium-catalyzed cyclization of ω-(2-iodoaryl)alkanenitriles
作者:Alexandre A. Pletnev、Richard C. Larock
DOI:10.1016/s0040-4039(02)00247-2
日期:2002.3
An efficient procedure for the synthesis of 2,2-disubstituted benzocyclic ketones by intramolecular carbopalladation of nitriles has been developed. The cyclization of substituted 3-(2-iodoaryl)propanenitriles affords indanones in high yields. The reaction is compatible with a wide variety of functional groups. This chemistry has been extended to the synthesis of tetralones, a 9-fluorenone and a cyclopentenone
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.
Utilization of Bu3SnSiMe3 in organic synthesis
作者:Miwako Mori、Naotake Kaneta、Masakatsu Shibasaki
DOI:10.1016/0022-328x(94)87005-5
日期:1994.1
A new cyclization reaction of an aryl or vinyl halide bearing a carbonyl group such as ketone or ester has been developed by use of a stannyl anion generated in DMF from Bu(3)SnSiMe(3) and Bu(4)NCl.
Mousseron et al., Bulletin de la Societe Chimique de France, 1957, p. 346,352