10468-61-8Relevant articles and documents
Synthesis of 1-tetralones by intramolecular Friedel-Crafts reaction of 4-arylbutyric acids using Lewis acid catalysts
Cui, Dong-Mei,Kawamura, Masato,Shimada, Shigeru,Hayashi, Teruyuki,Tanaka, Masato
, p. 4007 - 4010 (2003)
Intramolecular Friedel-Crafts reaction of 4-arylbutyric acids efficiently proceeded in the presence of catalytic amounts of Lewis acids such as Bi(NTf2)3 and M(OTf)3 (M=Bi, Ga, In and rare-earth metals) to form 1-tetralones. Chroman-4-one and thiochroman-4-one were also obtained in good yields from 3-phenoxypropionic acid and 3-phenylthiopropionic acid, respectively.
SCHWEFELVERBINDUNGEN DES ERDOELS XV. METHYL-5,6,7,8-TETRAHYDRODINAPHTHOTHIOPHENE UND METHYLDINAPHTHOTHIOPHENE
Boberg, Friedrich,Jachiewicz, Adam,Garming, Alfons
, p. 1 - 12 (2007/10/02)
A one pot synthesis gives methyl-5,6,7,8-tetrahydrodinaphthothiophenes (7) from methyl-1,2,3,4-tetrahydronaphthalen-1-ones (1) by bromination and sulfurization.Tetrahydro compounds 7 have been dehydrogenated to corresponding dinaphthothiophenes 8.Proofs for the constitutions are nmr data of 7, 8 and the independent synthesis of one compound 8.A reaction mechanism with 1,4-dithiine intermediates is discussed. Key words: Alkyl-1,2,3,4-tetrahydronaphthalen-1-ones; alkyl-5,6,7,8-tetrahydrodinaphthothiophenes; alkyldinaphthothiophenes; dehydrogenation with o-chlorobenzoquinone.