Abstract
The 2-alkynylphenoxy and -phenylthio radicals, conveniently generated by pyrolytic loss of Ph(3)PO and Me(.) from suitably substituted phosphorus ylides, undergo tandem cyclisation leading to tri- and tetracyclic fused benzofurans and benzothiophenes. The fundamental heterocyclic compound benzothieno[3,2-b]benzofuran has been prepared for the first time.
Original language | English |
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Pages (from-to) | 53-54 |
Number of pages | 2 |
Journal | Synlett |
Issue number | 1 |
Publication status | Published - Jan 1995 |
Keywords
- FLASH VACUUM PYROLYSIS
- PHOSPHORUS YLIDES
- TANDEM CYCLIZATION
- FUSED HETEROCYCLES
- BENZOTHIENO[3,2-B]BENZOFURAN