作者:Alastair Rae、José L. Castro、Alethea B. Tabor
DOI:10.1039/a902671a
日期:——
The functionalisation of homochiral N-(Boc)-tetrahydro-2H-1,3-oxazines with the Grignard reagent of (trimethylsilyl)acetylene under Lewis acidic conditions is described. This leads directly to homochiral propargyl amines in good yields, under mild conditions, and with moderate to good enantioselectivities. The stereochemistry of the major enantiomer was determined to be (R) by correlation, and a mechanism for the ring opening reaction has been proposed on this basis.
描述了在路易斯酸性条件下用(三甲基甲硅烷基)乙炔的格氏试剂对纯手性N-(Boc)-四氢-2H-1,3-恶嗪进行官能化。这直接导致在温和条件下以良好的收率和中度至良好的对映选择性获得纯手性炔丙胺。通过关联确定主要对映体的立体化学为(R),并在此基础上提出了开环反应的机理。