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Cycloaddition reactions of 2,4-diphenyl-1,3-diazabuta-1,3-dienes with isocyanates and isothiocyanates

โœ Scribed by Giorgio Abbiati; Alessandro Cirrincione de Carvalho; Elisabetta Rossi

Publisher
Elsevier Science
Year
2003
Tongue
French
Weight
142 KB
Volume
59
Category
Article
ISSN
0040-4020

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โœฆ Synopsis

The cycloaddition reactions of 1-p-tolyl and 1-benzyl-2,4-diphenyl-1,3-diazabuta-1,3-dienes with a variety of aryl and alkyl isocyanate and isothiocyanate are described. The reaction mechanism is also discussed.

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โœ Arun K Sharma; S Jayakumar; Mohinder P Mahajan ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 213 KB

The reactions of l-aryl-2-phenyl-4-methylthio-4-sccondaryamino / 4-N-allyl-N-aryl amino-1,3-diazabuta-l,3-dienes 1 with butadienylketene leading to a mixture of 5-dienyl pyrimidinones 4 and 5butenyl pyrimidinones 6 are reported. Tandem [1,5]H and [1,5]SMe shifts are invoked to explain fl~e formation