The tricycle (5) with two trans-fused angular methyl groups is constructed from tiglic aldehyde and (S)-carvone involving a stereocontrolled aldol reaction and an endo-selective intramolecular Diels–Alder (IMDA) reaction; the stereochemistry was established by an X-ray study.
具有两个反式融合的角
甲基的三轮车(5)是由蒂格醛和(S)-
香芹酮构成的,其中涉及立体控制的羟醛反应和内选择性分子内Diels-Alder反应(I
MDA);立体
化学是通过X射线研究确定的。