One-Carbon Homologation of Aldehydes to <i>N</i>-(α-Haloacyl)benzotriazoles
作者:Alan Katritzky、Srinivasa Tala、Sandeep Singh
DOI:10.1055/s-2006-950183
日期:——
One-carbon homologated N-(α-haloacyl)benzotriazoles have been synthesized from the corresponding aromatic and aliphatic aldehydes. Vinylbenzotriazoles, prepared by the reaction of aldehydes with the one-carbon synthon BtCH 2 P + Ph 3 Cl - , were subsequently treated with Br 2 /Et 3 N to give 1-bromovinylbenzotriazoles. These were then treated with NBS/NIS in CH 3 CN-H 2 O to furnish one-carbon homologated
由相应的芳香族和脂肪族醛合成了单碳同系的 N-(α-卤代酰基)苯并三唑。通过醛与单碳合成子BtCH 2 P + Ph 3 Cl - 反应制备的乙烯基苯并三唑随后用Br 2 /Et 3 N 处理得到1-溴乙烯基苯并三唑。然后将它们在 CH 3 CN-H 2 O 中用 NBS/NIS 处理,以 53-77% 的产率提供单碳同系化 N-(α-卤代酰基)苯并三唑。我们还展示了这些新试剂在有机合成中的实用性。