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Novel heteropentalenes. Synthesis of heteropentalenes from tetrahydroimidazo [1.2-d]-(1,2,4)-thiadiazoles and conversion of certain heteropentalenes to benzothiazole derivatives

✍ Scribed by Roger J.S. Beer; Hardev Singh; David Wright; Lars Kr. Hansen

Book ID: 104204503
Publisher: Elsevier Science
Year: 1981
Tongue: French
Weight: 411 KB
Volume: 37
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(01)88906-7

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✦ Synopsis

Alrtrwr-Oxidarion of I . phcnyltxrbamoylimidazolidinc . 2 . chionc gives 2.35.6 . IeInbydro . 2 . pbenylimidazo[l&f] . (IL41 -thiadiazole -3 _ OIX which undc~s addilion reactiom with hc~crccumulcncs kadirtg IO various hcltropcntak-ncs. Oxidation of I . p&nylIhiocarbnmoylimizolidine -2 -t&Gone yields I-(bcazorhiud .2 . yl) -imidudidinc .2. tin, also otid by acid utatyscd decomposition of 3.4 -et&no -23.45tetrahydro . 2.Sbispbcnyiimino . 1.6.6s" -~rithia -3.4 -diuapcnlrknc. A similar acid utrlysed dccompositioo IO a bcnzothiazok occurs with 23.45 . tetnbvdro . 1.6 -dipbcnyl . 3.4 -propano -6aS'" . ti _ 13.46 . ~e~raazapca~&nc-2.5~dithione.

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