THF gives the corresponding amines in 70–76% yields. Reduction of nitriles yields the corresponding amines in 70–75% yields. The I2/NaBH4 system is useful in the hydrocarboration of olefins and the corresponding alcohols are obtained in 78–92% yields after H2O2/OH− oxidation. The reagent system is also useful for the reduction of carboxylicesters and acids to the corresponding alcohols in 60–90% yields
Optically active materials could be generated by simple solidification of achiral materials without an external chiral source. When achiral cis-3,4-diphenylsuccinimides were solidified in the presence of a catalytic amount of DBU by evaporating the solvent with stirring, optically active trans-3,4-diphenylsuccinimides were obtained quantitatively with high enantiomeric excesses.
Convenient Synthetic Methods to C2 Symmetric 3,4-Diphenylpyrrolidines
作者:Vutukuri Dharma Rao、Mariappan Periasamy
DOI:10.1055/s-2000-6404
日期:——
Convenient methods of synthesis of racemic and optically pure 3,4-diphenylpyrrolidine derivatives, involving oxidative coupling of ethyl phenylacetate using TiCl4/Et3N and reduction of dl-2,3-diphenylsuccinic acid or the corresponding cyclic imide with NaBH4/I2 reagent in crucial steps, are described.