Diastereoselective and enantioselective catalysis of the carbonyl-ene reaction with fluoral
摘要:
The chiral titanium complex-catalyzed carbonyl-ene reaction with fluoral is shown to serve as an efficient route for the syn-diastereoselective and enantioselective synthesis of CF3-substituted compounds of biological and synthetic importance.
The chiraltitanium complex-catalyzed ene-type reaction and the Mukaiyama aldolreaction with fluoral are shown to serve as an efficient route to the enantioselective and diastercoselective synthesis of CF3-substituted components of biological and synthetic importance.
Diastereotropic Phenomena for the Appearance of SmCA<sup>*</sup>Phase in<i>α</i>-Trifluoromethyl-<i>β</i>-methyl-substituted Liquid Crystalline Molecules
Anti-ferroelectric (SmCA*) and ferroelectric (SmC*) phases of α-trifluoromethyl-β-methyl-substituted liquid crystalline (LC) molecules, synthesized highly diastereo- and enantioselectively through our chiral titanium complex-catalyzed fluoral-ene reaction, were determined by thermal analysis and electro-optic measurements. Phase transitions were thus found to be critically dependent on the diastereomeric excess (diastereotropic) for ul (Rα, Sβ)-diastereomers of the LC molecules.
通过热分析和电光测量,确定了α-三氟甲基-β-甲基取代液晶(LC)分子的反铁电性(SmCA*)和铁电性(SmC*)相,这些分子是通过我们的手性钛络合物催化氟烯反应高度非对映和对映选择性合成的。结果发现,相变与 LC 分子的 ul (Rα, Sβ)-非对映异构体的非对映过量(非对映各向同性)密切相关。
Diastereoselective and enantioselective catalysis of the carbonyl-ene reaction with fluoral
The chiral titanium complex-catalyzed carbonyl-ene reaction with fluoral is shown to serve as an efficient route for the syn-diastereoselective and enantioselective synthesis of CF3-substituted compounds of biological and synthetic importance.