Reaction of allyl iminophosphoranes with ketenes and acyl chlorides: one-pot preparation of 4-pentenenitriles
摘要:
One-pot conversion of allyl azides into 4-pentenenitriles 4 is achieved by sequential treatment of allyl azides with triphenylphosphine and the corresponding ketene under mild and neutral conditions. On the other hand, allyl iminophosphoranes and related react with arylacetic acid chlorides to give unexpectedly the phosphonium salts 5 which by treatment with base and then heating lead to 4-pentenenitriles 9.
A New Synthesis of α-Phenylhomoallylnitriles from β-Nitrostyrene and Allylic Silanes
作者:Hidemitsu Uno、Satomi Fujiki、Hitomi Suzuki
DOI:10.1246/bcsj.59.1267
日期:1986.4
TiCl4-catalyzed addition of allylic silanes to β-nitrostyrene affords γ,δ-unsaturated nitronates which, on treatment with low valent titanium in situ generated from Ti(IV) and zinc, are smoothly converted to γ,δ-unsaturated nitriles in moderate yields.