A nitrile-stabilized ammonium ylide as a masked C–CN synthon in heterocyclization with amidine–imine: 3-component assembly to fused pyrimidine scaffolds
作者:Sankar K. Guchhait、Meenu Saini、Divyani Sumkaria、Vikas Chaudhary
DOI:10.1039/c7cc02946b
日期:——
nitrile-stabilized quaternary ammonium ylide as masked C–C=N synthon in contrast to its usual sigmatropic rearrangement has been demonstrated. Its reaction with 2-aminopyridine-derived aldimine undergoes electronically-assisted nucleophilic additions and Hofmannelimination, and provides a new method to access fused-pyrimidines.
The Strecker reaction was performed via a one-pot three component condensation of hetero aromatic/aromatic aldehydes, secondary amines and trimetylsilyl cyanide in the presence of propylphosphonicanhydride (T3P®) to accomplish the corresponding α-aminonitriles. The main advantages of this method are very short reaction time and excellent yields.
Deuteriation and tritiation of aryl aldehydes in the formyl group and the synthesis of (±)-3,4-dihydroxy[β-<sup>2</sup>H<sub>2</sub>]phenylalanine
作者:D. J. Bennett、G. W. Kirby、V. A. Moss
DOI:10.1039/j39700002049
日期:——
Arylaldehydes have been converted into the corresponding α-aryl-α-morpholinoacetonitriles and thence, by treatment with base, into the derived benzylic anions. Quenching of these anions with deuterium oxide or tritiated water, followed by hydrolysis with mineral acid, gave formly-labelled aldehydes. [formyl-2H]-3,4-Dimethoxy-benzaldehyde gave, when heated with alkali, [methylene-2H2]-3,4-dimethoxybenzyl