On the regiochemistry of Mitsunobu alkylations of hydrazine derivatives
作者:Damian G. Dunford、Faryal Chaudhry、Benson Kariuki、David W. Knight、Robert C. Wheeler
DOI:10.1016/j.tetlet.2012.10.084
日期:2012.12
That differentially protected hydrazines of the type TsNHNHCOR3 undergo regiospecific Mitsunobu reactions with a variety of alcohols, R1R2CHOH in a generalised manner, to give good to excellent yields of the mono-adducts Ts(R1R2CH)NNHCOR3, has been proven by X-ray crystallographic analysis.
TsNHNHCOR 3类型的受不同保护的肼与多种醇R 1 R 2 CHOH以广义方式进行区域特异性的Mitsunobu反应,以使单加合物Ts(R 1 R 2 CH)NNHCOR 3的收率达到良好至极佳的水平,已通过X射线晶体学分析证明。
Pyrazine- and pyridine-substituted prop-2-yn-1-ols, but-3-yn-2-ols, and but-3-yn-2-ones – purification, stability, and handling revised
作者:Claudia Schindler、Carola Schulzke
DOI:10.1007/s10593-016-1811-0
日期:2015.11
A short series of alkynyl-substituted pyrazine and pyridine derivatives was synthesized by the palladium-catalyzed Sonogashiracross-couplingreactions between arylhalides and alkynes. All the products are either white solids or colorless liquids, which is partly in contrast to previous reports. After purification, a color change or intense darkening was observed, in some cases starting almost immediately