Nitrile biotransformations for the practical synthesis of highly enantiopure azido carboxylic acids and amides, ‘click’ to functionalized chiral triazoles and chiral β-amino acids
作者:Da-You Ma、De-Xian Wang、Qi-Yu Zheng、Mei-Xiang Wang
DOI:10.1016/j.tetasy.2006.08.021
日期:2006.9
(R)-12a underwent ‘click’ reactions with diethyl acetylenedicarboxylate and phenylacetylene to produce functionalized chiral triazoles 14 and 15, respectively. The easy preparation of the starting nitrile substrates, highlyefficient and enantioselective biotransformation reactions, and versatile utility of the resulting functionalized azido carboxylic acids and amidederivatives, render this method very
Unexpected Staudinger reaction of α-azidophenylacetonitrile and triphenylphosphine: synthesis and crystal structure of aminotriphenylphosphonium salt of phenylmalononitrile
Staudinger reaction of α-azidophenyiacetonitrile with triphenylphosphine in 1:2 molar ratio provides the triphenylphosphinazine derived from α-diazophenylacetonitrile, whereas in 2:1 molar ratio the final product is found to be the aminotriphenylphosphonium salt of phenylmalononitrile; X-ray structure analysis of this salt indicates that the anion and cation interact with one another via hydrogen bonding.
δ-叠氮苯乙腈与三苯基膦以 1:2 的摩尔比进行施陶丁格反应,可得到由δ-叠氮苯乙腈衍生的三苯基膦,而以 2:1 的摩尔比进行反应,则发现最终产物是苯基丙二腈的氨基三苯基膦盐;对这种盐的 X 射线结构分析表明,阴离子和阳离子通过氢键相互作用。
Gerrit, L'abbe; Deketele, Martine; Vanderstede, Els, Bulletin des Societes Chimiques Belges, 1988, vol. 97, # 2, p. 163 - 164
Unexpected Staudinger reaction of α-azidoacetonitriles α-phenyl substituted with triphenylphosphine. Preparation, X-ray crystal and molecular structures of a phosphazine, an aminophosphonium carbanion salt and a phosphazide, with (Z)-configuration
Staudinger reaction of α-azidophenylacetonitrile with triphenylphosphine in 1:2 molar ratio provides the triphenylphosphazine 4 derived from α-diazophenylacetonitrile, whereas in 2:1 molar ratio the final product is found to be the aminotriphenylphosphonium salt of phenylmalononitrile 6. However, the Staudinger reaction of α-azidodiphenylacetonitrile with triphenylphosphine affords the corresponding