Positional selectivity in reactions of pyrrole and its N-substituted derivatives with electrophiles
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Unusual regio- and stereo-selectivity in Diels-Alder (D-A) reactions were achieved between bulky N-phenylmaleimides and anthracene derivatives. Using multiple substituents with steric hindrance on both diene and dienophile, a noticeable shift toward 1,4-addition was successfully obtained. The substrate scope in this reaction was broad and the highest yield of anti-1,4-adducts was over 90%. Nove...
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The palladium-catalyzed cross-coupling reaction between organoboron compounds and organic halides or triflates provides a powerful and general methodology for the formation of carbon–carbon bonds. Recently, this reaction has been called the Suzuki coupling, Suzuki reaction, or Suzuki–Miyaura coupling, although we never referred to it as such previously. In this review, this name will be used wi...
متن کاملReactions of substituted furan-2-carboxaldehydes and furo[b]pyrrole type aldehydes with benzothiazolium salts.
A series of new push-pull compounds were synthesised by reaction of 5-aryl- furan-2-carboxaldehydes and furo[b]pyrrole type aldehydes with benzothiazolium salts. These new condensation products represent highly conjugated systems that have potential biological activity. The reaction of furo[b]pyrrole type aldehydes with benzothiazolium salts give potential precursors of cyanine dyes.
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ژورنال
عنوان ژورنال: Arkivoc
سال: 2003
ISSN: 1551-7012
DOI: 10.3998/ark.5550190.0004.d08