Tetrahedron Letters p. 7445 - 7446 (1992)
Update date:2022-08-03
Topics:
Craig, Donald
Etheridge, Christopher J.
Smith, Alison M.
Lithiation of 1-benzyloxy-3-(p-tolylsulfonyl)propene 6 and reaction with aldehydes give alcohols 7. Sequential hydrolysis-cyclization, oxidation and DBU-mediated elimination of dine elements of p-TolSO2H gives 4-substituted 2-butenolides 10 in good overall yield.
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(1977)
