在这项研究中,我们在Boc的存在下,由奎宁衍生的伯胺L7催化了吡唑啉-5-酮(或4-羟基-2-吡喃酮)与查耳酮之间的有效且新颖的对映选择性Michael /环脱水顺序反应- d -Phg-OH。以优异的对映选择性(最高93%)和中等产率获得了手性吡喃吡唑和吡喃香豆素,并以高收率(最高84%)获得了对映体选择性。
effective and novel enantioselectiveMichael/cyclodehydration sequential reaction between pyrazolin-5-one (or 4-hydroxy-2-pyrone) and chalcones that is catalyzed by a quinine-derivedprimaryamine L7 in the presence of Boc-D-Phg-OH. Chiral pyranopyrazoles and pyranocoumarins were obtained in excellent enantioselectivities (up to 93%) with moderate yields and moderate enantioselectivities with high yields
在这项研究中,我们在Boc的存在下,由奎宁衍生的伯胺L7催化了吡唑啉-5-酮(或4-羟基-2-吡喃酮)与查耳酮之间的有效且新颖的对映选择性Michael /环脱水顺序反应- d -Phg-OH。以优异的对映选择性(最高93%)和中等产率获得了手性吡喃吡唑和吡喃香豆素,并以高收率(最高84%)获得了对映体选择性。