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Dispiro-[1,3,3-trimethylindolin-2,2′-(2′H,8′H)benzo[1,2-b;3,4-b] dipyran-8′,2″-1″,3″,3″-trimethylindolin]

✍ Scribed by C. Schiele; S. Arnold; A. Wilhelm; H.O. Kalinowski

Publisher
Elsevier Science
Year
1967
Tongue
French
Weight
85 KB
Volume
8
Category
Article
ISSN
0040-4039

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One-pot synthesis of novel spiro 2,3,7,8-tetrahydro-benzo[1,2-b:5,4-b′]dipyran-4,6-dione and 2,3,8,9-tetrahydro-benzo[1,2-b:4,3-b′]dipyran-4,10-dione derivatives
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An efficient synthesis of novel spiro 2,3,7,8-tetrahydro-benzo[1,2-b:5,4-b 0 ]dipyran-4,6-dione and 2,3,8,9tetrahydro-benzo[1,2-b:4,3-b 0 ]dipyran-4,10-dione derivatives in high yields under microwave irradiation is described. The reaction was also studied under conventional heating conditions.