?url_ver=Z39.88-2004&rft_id=10.1021%2Fjo990089v&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Wipf%2C+P&rft.aulast=Wipf&rft.aufirst=P&rft.issue=18&rft.volume=64&rft.date=3+September+1999&rft.issn=0022-3263&rft.atitle=Efficient+synthesis+of+1%2C4-dihydro-2H-isoquinoline-3%2C5%2C8-triones+via+cyclobutene+ring+expansion&rft.title=Journal+of+Organic+Chemistry&rft.pages=6881+-+6887&rft.genre=article