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Studies in the claisen rearrangement. Part XII . Synthesis of benzofuro[3,2‐ c ] [l]‐6a,lla‐dihydro‐lla‐methylbenzopyrans from 1,4‐diaryloxy‐2‐butynes
Author(s) -
Majumdar K. C.,
Thyagarajan B. S.,
Balasubramanian K. K.
Publication year - 1973
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570100205
Subject(s) - claisen rearrangement , chemistry , carroll rearrangement , stereochemistry , benzopyrans , sigmatropic reaction
Successful Claisen rearrangement of a number of 1,4‐diaryloxy‐2‐butynes is reported. The products of such a rearrangement are the benzofuro[3,2‐ c ]benzopyrans. This novel rearrangement offers a facile synthetic route to tetracyclic derivatives resembling the naturally occurring pterocarpans.