Synthesis of new ferrocenyl aminoalcohols and aminonitriles and catalytic properties of the aminoalcohols in the ethylation of benzaldehyde
摘要:
Chiral ferrocenyl aminoalcohols possessing either OH or NR2 functionality alpha to the ferrocenyl ring were prepared and exhibit modest enantioselectivities for the addition of diethylzinc to benzaldehyde. Chiral ferrocenyl aminonitriles exhibit a facile inversion process in protonic solvents. (C) 1998 Elsevier Science Ltd. All rights reserved.
Iodine as a novel and efficient reagent for the synthesis of α-aminonitriles by a three-component condensation of carbonyl compounds, amines, and trimethylsilyl cyanide
作者:Laurel Royer、Surya K. De、Richard A. Gibbs
DOI:10.1016/j.tetlet.2005.05.005
日期:2005.7
A straightforward and general method has been developed for the synthesis of α-aminonitriles by simply combining aldehydes or ketones, amines, and trimethylsilylcyanides in the presence of a catalytic amount of molecular iodine at room temperature.
A simple and efficient one-pot method was developed to give α-aminonitriles from aldehydes + amines + TMSCN in LPDE. Optically active α-aminonitriles were snythesized by using (S)-(−)- or (R)-(+) α-methylbenzylamine, (S)-(−) α-methylbenzylamine affords predominantly S-aminonitriles and (R)-(+) α-methylbenzylamine leads to the R-aminonitriles.
The synthesis of a series of new chiral α-aminonitriles was achieved in a diastereoselective Strecker reaction in a one-pot procedure with aldehydes, enantiopure amines, and acetone cyanohydrin in water. Primary and secondary amines derived from L-α-amino acids were used as sources of chirality. The reactions proceeded efficiently without any catalyst at room temperature. The diastereoselectivity of
One-pot synthesis of α-aminonitriles from alkyl and aryl cyanides: a Strecker reaction via aldimine alanes
作者:Szabolcs Sipos、István Jablonkai
DOI:10.1016/j.tetlet.2009.02.004
日期:2009.4
A one-pot Strecker reaction using various alkyl, arylalkyl and arylnitriles is developed. Aldimine alanes were generated in situ from nitriles by the addition of diisobutylaluminium hydride, and were converted into the corresponding imines on reaction with (S)-(-)-1-phenylethylamine. Nucleophilic addition to the imines in the presence of catalytic triethylamine, using acetone cyanohydrin as a cyanide source, provided alpha-aminonitriles. (C) 2009 Elsevier Ltd. All rights reserved.