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Syntheses of naphtho[2,3-i]-5,14-dimethyl-1,3-bisdehydro[l4]annulene and naphtho[1,2-i]-5,14-dimethyl-1,3-bisdehydro[l4]annulene,ring-expanded analogues of anthracene and phenanthrene

โœ Scribed by Timothy C. Walsgrove; Franz Sondheimer

Publisher
Elsevier Science
Year
1978
Tongue
French
Weight
220 KB
Volume
19
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

A method has recently been developed in these laboratories, whereby benzannelated bisdehydroannulenes [e.g., benzo~i]-5,14-dimethyl-l,3-bisdehydro~14]annulene (111 can be obtained readily.

2 ---We now describe the use of this method for the synthesis of the title compounds (21 and (21, dimethylbisdehydro[14]annulenes containing a naphthalene ring fused in the 2,3-and

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