Diastereo- and Enantioselective Construction of Oxindole-Fused Spirotetrahydrofuran Scaffolds through Palladium-Catalyzed Asymmetric [3+2] Cycloaddition of Vinyl Cyclopropanes and Isatins
作者:Liang-yong Mei、Yin Wei、Qin Xu、Min Shi
DOI:10.1021/om400473p
日期:2013.6.24
A novel asymmetric formal [3+2] cycloaddition of vinyl cyclopropanes and isatins in the presence of Pd2(dba)3 and the chiral imidazoline-phosphine ligand (aS,R,R)-L3 has been developed, affording the corresponding highly functionalized oxindole-fused spirotetrahydrofuran frameworks in good yields along with good diastereo- and high enantioselectivities under mild conditions.
一种新型不对称正式[3 + 2]在钯的存在下的乙烯基环丙烷与靛红的环加成2(DBA)3和手性咪唑啉膦配体(一个S,R,R) - L3已经被开发出来,得到的高度对应在温和条件下以高收率和良好的非对映异构性和高对映选择性对官能化的羟吲哚稠合的螺四氢呋喃骨架进行合成。