Synlett p. 418 - 422 (2012)
Update date:2022-08-04
Topics:
Jepsen, Tue Heesgaard
Larsen, Mogens
J?rgensen, Morten
Nielsen, Mogens Br?ndsted
We present a novel three-step protocol for preparing xanthene/thioxanthene and dibenzothiepine/dibenzoxepine from readily available starting materials. The Mizoroki-Heck cyclization as the final step was optimized to afford full conversion of the corresponding diaryl (thio)ethers and furthermore to achieve reasonably good selectivity between the 6-exo and the 7-endo products. Georg Thieme Verlag Stuttgart · New York.
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