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2004
Metathesis reactions
O 0286
Ring-Closing Metathesis of Vinyl Chlorides for Formation of 5-, 6- and 7-Membered Carbocyclic and Heterocyclic Systems. — The title reaction under conditions
52- 045 A)
is found to be successful for a series of olefinic vinyl chloride substrates. Attempts
to prepare a tetrasubstituted cyclopentene (IV) or larger rings such as (Xb) and (XII)
fail. Triene (V) gives only cyclopentene (VI). Furthermore, vinyl bromides or triflates
as the starting material do not react. — (CHAO, W.; MEKETA, M. L.; WEINREB*, S.
M.; Synthesis 2004, 12, 2058-2061; Dep. Chem., Pa. State Univ., University Park,
PA 16802, USA; Eng.) — Lindner
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