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The reaction of tropone with sulfonium ylids a synthesis of 2,3-homotropones and 2,3-4,5-dihomotropones

✍ Scribed by Yukio Sugimura; Nobuo Soma

Publisher
Elsevier Science
Year
1970
Tongue
French
Weight
165 KB
Volume
11
Category
Article
ISSN
0040-4039

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✦ Synopsis

Received in Japan 2 March 1970; received in UK for publication 31 firoh 1970)

The first synthesis of a 2,3-homotropone was carried out by Pettit et al 1) from cyclooctatetraene via several steps. In this communication we would like to report a

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## Abstract 2‐Butynedinitrile reacts by (2 + 4)‐cycloaddition with one or two equivalents of 2,3,4,5‐tetramethylfuran to give 1,4,5,6‐tetramethyl‐7‐oxabicyclo[2.2.1]hepta‐2,5‐diene‐2,3‐dicarbonitrile (**1**) and 1α,4α,4aα, 5β,8β,8aα‐hexahydro‐1,2,3,4,5,6,7,8‐octamethyl‐1,4:5,8‐diepoxy‐naphthalene‐4