http://pubs.acs.org/doi/abs/10.1021/jo701764e?source=chemport&journalCode=joceah


http://pubs.acs.org/doi/abs/10.1021/ol702489k?source=chemport&journalCode=orlef7


http://pubs.acs.org/doi/abs/10.1021/ol8000975?source=chemport&journalCode=orlef7


http://pubs.acs.org/doi/abs/10.1021/ol8003589?source=chemport&journalCode=orlef7


http://pubs.acs.org/doi/abs/10.1021/jo8027938?source=chemport&journalCode=joceah


hi-res pdf

多谢！