http://pubs.acs.org/doi/abs/10.1021/ol1009812

http://pubs.acs.org/doi/abs/10.1021/ol1011955

http://pubs.acs.org/doi/abs/10.1021/ol101035p

http://pubs.acs.org/doi/abs/10.1021/ol100822k

his-pdf

多谢！