作者:Justin M. Lopchuk、Ilene L. Green、Jeanese C. Badenock、Gordon W. Gribble
DOI:10.1021/ol402042f
日期:2013.9.6
short, protecting group-free total synthesis of bruceollines D, E, and J has been achieved. The enantioselective reduction of bruceolline E with β-chlorodiisopinocampheylborane delivers both the natural and unnatural enantiomers of bruceolline J in excellent yields and enantioselectivities. Reduction with baker’s yeast and sucrose was shown to provide the unnatural enantiomer of bruceolline J in 98% ee
布鲁索林D,E和J的短时无保护基团的全合成已实现。用β-氯二异opinocampheylborane对bruceolline E进行对映选择性还原,可以以优异的收率和对映选择性同时提供bruceolline J的天然和非天然对映异构体。已显示用面包酵母和蔗糖还原可在98%ee中提供Bruceolline J的非天然对映异构体。