New enantiomerically pure 1,2-dihydropyridine and its use for construction of optically active 2-azabicyclo[2.2.2]octane
作者:Yoshihiro Matsumura、Yasuharu Nakamura、Toshihide Maki、Osamu Onomura
DOI:10.1016/s0040-4039(00)01342-3
日期:2000.9
An enantiomerically pure 1,2-dihydropyridine 1 was prepared from l-lysine utilizing anodic oxidation as a key step, and was utilized as a chiral diene synthon of the Diels–Alder reaction. Furthermore, a suitable condition for the Diels–Alder reaction between 1 and N-acryloyloxazolidinone (8) was exploited. That is, the presence of AlCl3 efficiently promoted the Diels–Alder reaction to give a cycloadduct
对映体纯的1,2-二氢吡啶1是由L-赖氨酸以阳极氧化为关键步骤制备的,并用作Diels-Alder反应的手性二烯合成子。此外,还为1和N-丙烯酰基恶唑烷酮(8)之间的Diels-Alder反应开发了合适的条件。也就是说,AlCl 3的存在有效地促进了Diels-Alder反应,从而产生了具有高立体选择性的环加合物,该环加合物被转化为旋光性的2-氮杂双环[2.2.2]辛烷衍生物2(96.8%ee)。