Tetrahedron Letters p. 5583 - 5587 (2000)
Update date:2022-09-26
Topics:
Nakache, Philippe
Ghera, Eugene
Hassner, Alfred
A novel Michael-initiated ring closure reacton involving allylic chlorosulfone (2) and γ-alkoxy-α,β-ynoates to afford 4- methylenecyclopentenecarboxylates is reported, while with γ-alkylynoates no reaction occurred. With chiral phenyl ynoates 4, the reaction proceeds by 1,3-asymmetric induction and leads further to a nonracemic annulated α,β- butenolide (7). (C) 2000 Elsevier Science Ltd.
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