Tetrahedron Letters p. 2351 - 2354 (1989)
Update date:2022-08-05
Topics: Regiocontrolled
Molander, Gary A.
Andrews, Steven W.
In the presence of titanium tetrachloride, 1,3-bis(trimethoxysiloxy)-1-methoxy-1,3-butadiene (1) undergoes facile <3+n> annulation reactions with 1,4 -and 1,5-dielectrophiles to generate seven- and eight-membered bicyclic ether adducts.The annulations occur in good yields (49-83percent) and are also highly regioselective for substrates containing two distinct electrophilic groups.
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