Qi Jun, Roush William R
Department of Chemistry, University of Michigan, Ann Arbor, 48109, USA.
Org Lett. 2006 Jun 22;8(13):2795-8. doi: 10.1021/ol0609208.
[reaction: see text] A direct synthesis of the alpha-hydroxyaldehyde exo-5, a precursor of the exo-spirotetronate subunit of the quartromicins, was achieved through an exo-selective Lewis acid-catalyzed Diels-Alder reaction of dienophile 12a and diene 1.
[反应:见正文] 通过亲双烯体12a与二烯1的外向选择性路易斯酸催化的狄尔斯-阿尔德反应,实现了四霉素外向螺四环酮亚基前体α-羟基醛外向-5的直接合成。