New and regioselective synthesis of 4-ylidene-tetronic acids by Lewis- acid catalyzed cyclization of 4-alkoxy-bis-(trimethylsiloxy)-1,3-dienes with oxalyl chloride

Synlett

Volumn , Issue 6, 2000, Pages 844-846

  Langer, Peter ^a   Eckardt, Tobias ^a  

^a UNIVERSITY OF GÖTTINGEN   (Germany)

Author keywords

Butenolides; Cyclizations; Dianion synthons; Oxalic acid; Regioselectivity

Indexed keywords

ASCORBIC ACID; BUTENOLIDE; CHLORIDE; HYDROXYL GROUP; TETRONIC ACID DERIVATIVE;

ARTICLE; CATALYSIS; CYCLIZATION; DRUG SYNTHESIS; REACTION ANALYSIS; STEREOCHEMISTRY;

EID: 0034046045     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

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29. 7: C, 59.21; H, 3.98. Found: C, 59.35; H, 4.22. All new compounds were characterized by spectroscopic methods and gave correct analytical and/or high resolution mass data.