Mild thermal reaction of enones with N-(benzofuran-3- yl)iminophosphorane, newly prepared by Staudinger reaction of 3- azidobenzofuran with triphenylphosphine, provides a synthetic entry to virtually unknown benzo[4,5]furo[3,2-b]pyridines via a tandem aza-Wittig–electrocyclization process. Key words: iminophosphoranes, azides, aza-Wittig, electrocyclization
A New Entry to Benzo[4,5]furo[3,2-b]pyridines via N-(Benzofuran-3-yl)iminophosphorane / M. Funicello; V. Laboragine; R. Pandolfo; P. Spagnolo. - In: SYNLETT. - ISSN 0936-5214. - STAMPA. - 2010:(2010), pp. 77-80. [10.1055/s-0029-1218551]
A New Entry to Benzo[4,5]furo[3,2-b]pyridines via N-(Benzofuran-3-yl)iminophosphorane.
SPAGNOLO, PIERO
2010
Abstract
Mild thermal reaction of enones with N-(benzofuran-3- yl)iminophosphorane, newly prepared by Staudinger reaction of 3- azidobenzofuran with triphenylphosphine, provides a synthetic entry to virtually unknown benzo[4,5]furo[3,2-b]pyridines via a tandem aza-Wittig–electrocyclization process. Key words: iminophosphoranes, azides, aza-Wittig, electrocyclizationFile in questo prodotto:
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