Periselective and enantioselective carbonyl–ene reaction of isoprene with fluoroalkyl glyoxylate catalysed by modified binaphthol–titanium complex: asymmetric catalytic synthesis of enantiomerically pure ipsdienol
作者:Masahiro Terada、Koichi Mikami
DOI:10.1039/c39950002391
日期:——
The asymmetric reaction of trifluoroethyl glyoxylate 3d with isoprene 4 catalysed by the modified binaphtholâtitanium complex 2b provides the ene product 5d in high periselectivity (92%) and complete enantioselectivity, which can be converted to ipsdienol 1, a component of the aggregation pheromone of the bark beetle, genus lps, in enantiomerically pure form.
三氟乙基乙醇酸酯3d与异戊二烯4在改性联萘酚钛络合物2b催化下发生的不对称反应,以92%的高产率和完全的立体选择性提供了ene产物5d,该产物可以转化为纯对映体形式的ipsdienol 1,即树皮甲虫(lps属)聚集信息素的一个组分。