Abstract
A catalyst system comprising 10 mol % (Pd(OAc) and 20 mol % PPh3 effects the cyclisation of aryl halides onto proximate alkenes via 5-, 6-, and 7-exo-trig, and 7-endo-trig processes giving a variety of bridged-ring carbo- and hetero-cycles in excellent yield. Double bond isomerisation in the product is rarely encountered and may be suppressed by the addition of Tl(1) salts. One example of diastereospecific bis-cyclisation is given and the crystal structure of 1-aza-2-sulphonyl-3,4-benzobicyclo[3.2.1]nona-6-ene is reported.
Original language | English |
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Pages (from-to) | 9703-9720 |
Number of pages | 18 |
Journal | Tetrahedron |
Volume | 47 |
Issue number | 46 |
Publication status | Published - 25 Nov 1991 |
Keywords
- PALLADIUM CATALYSIS
- BRIDGED-RING CYCLIZATION
- METAL-PROMOTED CYCLIZATION
- ANION CAPTURE PROCESSES
- POLYENE CYCLIZATIONS
- CRYSTAL-STRUCTURE
- SILVER-NITRATE
- ARYLATION
- VINYLATION
- COMPLEXES
- HALIDES
- ALKENES