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(6aα,6bβ,12bβ,12cα)-6a,6b,12b,12c-Tetrahydrocyclobuta[1,2-c:4,3-c']di[1]benzothiopyran-6,7-dione

✍ Scribed by Kopf, J. ;Maelger, H. ;Thiemann, C. ;Margaretha, P.


Book ID
114511287
Publisher
International Union of Crystallography
Year
1994
Tongue
English
Weight
340 KB
Volume
50
Category
Article
ISSN
0108-2701

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Regioselective synthesis of [6c,12b-cis]
✍ Krishna C. Majumdar; Pranab Chatterjee; Subrata Saha 📂 Article 📅 1998 🏛 Elsevier Science 🌐 French ⚖ 116 KB

Asyloxymethylpyrano[2, [l]henzopyran-5(3H)-ones (la-f) on heating in N,N-diethylaniline snffereda [3s,3s] sigmatropic rearrangement followedby enolisation andan internal [1,61 Michael addition of the phenolic moiety to the diene-lactone moiety to give [6c,7,12b,4=B4 : 4,5]pyrano[2,3-c]chromen-l-one