A general procedure for preparing .alpha.-lithiosilanes. Generalization of the Peterson olefination
作者:Theodore Cohen、James P. Sherbine、James R. Matz、Robert R. Hutchins、Barry M. McHenry、Paul R. Willey
DOI:10.1021/ja00323a031
日期:1984.5
On prepare des α-lithiosilanes par lithiation reductrice de diphenylthioacetals a l'aide du dimethylamino-1 naphtalenure de lithium, traitement de l'anion resultant par Me 3 SiCl et lithiation reductrice de l'α-(phenylthio) silane correspondant. La reactiondes composes obtenus avec les aldehydes et les cetones conduit aux alcools precurseurs des olefines
在制备脱 α-锂化还原脱二苯基硫缩醛 a l'aide du dimethylamino-1 naphtalenure de 锂,性状 de l'anion 生成 par Me 3 SiCl 等锂化还原 de l'α-(苯硫基) 硅烷对应物。La 反应 des 组成 obtenus avec les 醛和 les cetones 管道 aux alcools precurseurs des 烯烃
ethylsilanes 12 by base-induced α-elimination. This is confirmed by [2+1] cycloadditions with alkenes to give the cyclopropanes 4a–d and 14. Product 4a is identical with the product obtained from carbanion 1c, phenyloxirane, and styrene, for which a carbene intermediate 5a had been invoked. On heating in the presence of copper triflate, cyclopropane 4a undergoes ringenlargement to the thiochroman
Highly efficient synthesis of alkylidene- and allylidenecyclopropanes
作者:Theodore Cohen、Sang-Hun Jung、Matthew L. Romberger、Dennis W. McCullough
DOI:10.1016/0040-4039(88)80006-6
日期:1988.1
Alkylidene- and allylidenecyclopropanes are prepared by treating the intermediates formed upon addition of aldehydes to α-lithio(cyclopropyl)silanes with potassiumtert-butoxide.
通过用叔丁醇钾处理将醛加成到α-硫代(环丙基)硅烷上时形成的中间体来制备亚烷基-和亚烷基-环丙烷。
The Cyclopropylalkylidenecyclopropane Thermal Double Ring Expansion. A Novel Route to the Bicyclo[5.3.1]undecane Skeleton of the AB Ring System of Taxanes<sup>1</sup>
作者:Hong Liu、Craig A. Shook、James A. Jamison、Mohan Thiruvazhi、Theodore Cohen
DOI:10.1021/ja973232f
日期:1998.1.1
COHEN, TH.;SHERBINE, J. P.;MATZ, J. R.;HUTCHINS, R. R.;MCHENRY, B. M.;WIL+, J. AMER. CHEM. SOC., 1984, 106, N 11, 3245-3252
作者:COHEN, TH.、SHERBINE, J. P.、MATZ, J. R.、HUTCHINS, R. R.、MCHENRY, B. M.、WIL+