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)。