Selectivity in Organic Group Transfer in Reactions of Mixed Diorganomanganese(II) and Triorganomanganate(II) with 2-Cyclohexen-1-one or Cyclohexanecarbaldehyde
The unsymmetrical diorganomanganeses(II) (R1R2Mn) and magnesium triorganomanganates(II) (R12R2MnMgX) reacted with 2-cyclohexen-1-one to produce the 1,4-addition products in moderate to good yields. The approximate reactivity order obtained from the product distribution was CH2=CHCH2 > PhS > n-Bu > Ph > Me, Me3SiCH2, n-C6H13–C≡C. In contrast, the reactivity order for the addition of these reagents to
Addition of trimethylsilylmethylmagnesium chloride to α, β-unsaturated carbonyls
作者:Richard T. Taylor、James G. Galloway
DOI:10.1016/s0022-328x(00)82282-2
日期:1981.11
Reactions of α,β-unsaturated carbonyl compounds with Me3SiCH2MgCl, prepared from chloromethyltrimethylsilane [1], were examined. Unlike its lithium counterpart (Me3SiCH2Li), which adds to α,β-unsaturatedketones in the 1,2-sense, the Grignardreagent afforts γ silanes via a 1,4-addition sequence. This tendency is accentuated by the addition of Cu2Br2. Addition of the Grignardreagent to α,β-unsaturated
考察了α,β-不饱和羰基化合物与由氯甲基三甲基硅烷[1]制得的Me 3 SiCH 2 MgCl的反应。不同于其锂对应物(Me 3 SiCH 2 Li),后者会在1,2-感官中添加α,β-不饱和酮,格氏试剂通过1,4-添加序列促进γ硅烷的合成。通过添加Cu 2 Br 2加剧了这种趋势。将格氏试剂添加到α,β-不饱和醛中可得到简单的1,2-加成产物。
Addition of trimethylsilyllithium and trimethylstannyllithium to a hindered cyclopropyl enone
作者:Richard T Taylor、James G Galloway
DOI:10.1016/s0040-4039(00)88581-0
日期:1982.1
Addition of Me3SiLi or Me3SaLi to affords cyclopropyl cleavage to the ring expanded system ( and ).
加入Me 3 SiLi或Me 3 SaLi可将环丙基裂解成扩环体系(和)。
Hannah, Donald J.; Smith, Robin A.J.; Teoh, Irene, Australian Journal of Chemistry, 1981, vol. 34, # 1, p. 181 - 188
作者:Hannah, Donald J.、Smith, Robin A.J.、Teoh, Irene、Weavers, Rex T.
DOI:——
日期:——
TIETZE, LUTZ E.;WUNSCH, JOSEF R., SYNTHESIS,(1990) N1, C. 985-990