Cycloaromatization ofα-oxoketene dithioacetals with lithioacetonitrile and lithiopropionitrile: a facile route to substituted and annelated pyridines
H Ila, H Junjappa
Index: Gupta, Arun K.; Ila, Hiriyakkanavar; Junjappa, Hiriyakkanavar Tetrahedron, 1990 , vol. 46, # 7 p. 2561 - 2572
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Abstract
The enolacetals 1 _ obtained by 1, 2-addition of lithioacetonitrile or lithioprop-ionitrile to α- Oxoketene dithioacetals 0 undergo intramolecular Ritter reaction accompanied with 1, 3- MeS shift in the presence of phosphoric acid to afford a variety of substituted and annelated
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