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Formation of benzo[b]thiophens and related compounds by a rearrangement involving ring contraction

✍ Scribed by MacNicol, David D.; McKendrick, Joseph J.


Book ID
120981655
Publisher
Royal Society of Chemistry
Year
1974
Weight
405 KB
Category
Article
ISSN
1472-7781

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Synthesis and cycloadditions of 9H-furo[
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C-2 lithiation of acetals 2 followed by trapping with aldehydes gives 3. Subsequent unmasking of the acetal function provides furobenzo(thio)pyrans 4, cycloadditions of which have been investigated.