A conjugate addition-elimination route to alkenoyltrimethylsilanes
摘要:
Monosubstitution of 3,3-dichloro-1-(trimethylsilyl)2-propenone (1) with organocuprates stereoselectively affords E-3-alkyl- and Z-3-phenyl-3-chloro-1-(trimethylsilyl)-2-propenones. Further substitution proceeds stereoselectively as a function of extant and incoming substituents. 1 was also reduced to E-3-chloro-1-(trimethylsilyl)-2-propenone and the latter converted to E-3-alkyl- and E-3-phenyl-1-(trimethylsilyl)-2-propenones.
A conjugate addition-elimination route to alkenoyltrimethylsilanes
摘要:
Monosubstitution of 3,3-dichloro-1-(trimethylsilyl)2-propenone (1) with organocuprates stereoselectively affords E-3-alkyl- and Z-3-phenyl-3-chloro-1-(trimethylsilyl)-2-propenones. Further substitution proceeds stereoselectively as a function of extant and incoming substituents. 1 was also reduced to E-3-chloro-1-(trimethylsilyl)-2-propenone and the latter converted to E-3-alkyl- and E-3-phenyl-1-(trimethylsilyl)-2-propenones.
Synthesis of 4-Hydroxy-2-cyclopentenone Derivatives by [3 + 2] Annulation of β-Heteroatom-Substituted Acryloylsilanes and Lithium Enolate of Methyl Ketones
The [3 + 2] annulation using β-[2-(pyridyl)thio] and β,β-dichloro derivatives of acryloylsilane and the lithiumenolate of methylketones successfully proceeded to afford 4-alkyl-4-hydroxy-3-(2-pyridylthio)cyclopentanone and 4-alkyl-3-chloro-4-hydroxy-2-cyclopentenone, respectively.
The preparation of 3-chloroalkenoyltrimethylsilanes
作者:Robert F. Cunico、Cui-ping Zhang
DOI:10.1016/s0040-4039(00)61767-7
日期:1992.11
3,3-Dichloropropenoyltrimethylsilane undergoes monosubstitution with organocuprates RCu(CN)Li to afford E-3-chloroalkenoyltrimethylsilanes.
Preparation of Allenoyltrmethylsilanes
作者:Robert F. Cunico、Cui-ping Zhang
DOI:10.1080/00397919508011383
日期:1995.2
Dehydrochlorination of 3-chloro-2- or -3-alkenoyltrimethylsilanes with DBU affords the parent 2,3-butadienoyltrimethylsilane, as well as 4-monoalkyl- and 4,4-dialkyl homologues.
A conjugate addition-elimination route to alkenoyltrimethylsilanes
作者:Robert F. Cunico、Cui-ping Zhang
DOI:10.1016/0040-4020(95)00561-l
日期:1995.1
Monosubstitution of 3,3-dichloro-1-(trimethylsilyl)2-propenone (1) with organocuprates stereoselectively affords E-3-alkyl- and Z-3-phenyl-3-chloro-1-(trimethylsilyl)-2-propenones. Further substitution proceeds stereoselectively as a function of extant and incoming substituents. 1 was also reduced to E-3-chloro-1-(trimethylsilyl)-2-propenone and the latter converted to E-3-alkyl- and E-3-phenyl-1-(trimethylsilyl)-2-propenones.