Studies on polycyclic thiaarenes: Part  II  . An improved synthesis of phenanthro[1,2‐ b ]thiophene and a synthesis of acenaphtho[1,2‐ b ]naphtho‐[2,3‐ d ]thiophene, a novel polynuclear thiaarene | Zendy

Kar Gandhi K. | Zendy; Karmakar Arun C. | Zendy; Ray Jayanta K. | Zendy

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Studies on polycyclic thiaarenes: Part II . An improved synthesis of phenanthro[1,2‐ b ]thiophene and a synthesis of acenaphtho[1,2‐ b ]naphtho‐[2,3‐ d ]thiophene, a novel polynuclear thiaarene

Author(s) -

Kar Gandhi K.,

Karmakar Arun C.,

Ray Jayanta K.

Publication year - 1991

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.5570280428

Subject(s) - chemistry , phthalic anhydride , thiophene , aldehyde , dehydrogenation , decarboxylation , condensation , derivative (finance) , medicinal chemistry , organic chemistry , hydrolysis , formaldehyde , catalysis , economics , thermodynamics , physics , financial economics

An improved synthesis of phenanthro[1,2‐ b ]thiophene ( 6 ) from 1‐chloro‐3,4‐dihydrophenanthrene‐2‐aldehyde ( 2 ) by condensation with thioglycolate followed by hydrolysis, decarboxylation and dehydrogenation is described. A new polycyclic thiophene derivative 14 has also been prepared from acenaphthothiophene ( 7 ) by Friedel‐Craft's reaction with phthalic anhydride followed by lactonisation of the keto carboxylic acid 9 and then reduction and finally cyclisation of the resultant aldehyde 13 .

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