A remarkable effect of solvent on the enantioselectivity was observed in the asymmetric Diels–Alder reaction of 3-(2-alkenoyl)-1,3-oxazolidin-2-ones and dienes catalyzed by a chiral titanium reagent, and the Diels–Alder adducts were obtained in high enantioselectivity when alkyl-substituted benzenes were employed as the solvent.
在手性
钛试剂催化的 3-(2-烯酰基)-
1,3-恶唑烷-2-酮和二烯的不对称 Diels-Alder 反应以及 Diels-Alder 加合物中观察到溶剂对对映选择性的显着影响当使用烷基取代的苯作为溶剂时,以高对映选择性获得。