Synthesis and properties of tetrazolium-N-phenacylides. Part 2
摘要:
Various 1 -alkyl-5-methyl-1H-tetrazolium-4-phenacylides 3 (homologues of C) have been prepared, acylated and (thio)carbamoylated. The unstable ylide C has been acylated in situ.
A novel method for the synthesis of 5-substituted 1H-tetrazoles using diphenyl phosphorazidate (DPPA) has been developed. Aromatic and aliphatic aldoximes underwent cycloaddition to afford the corresponding 5-substituted 1H-tetrazoles with ease and efficiency.
Preparation of 5-Substituted 1<i>H</i>-Tetrazoles Catalyzed by Scandium Triflate in Water
作者:Adiel Coca、Evan Turek、Liana Feinn
DOI:10.1080/00397911.2014.957775
日期:2015.1.17
Abstract Several 5-substituted1H-tetrazoles were prepared in water or isopropanol/water mixtures using microwave heating. Good yields were obtained for the [2 + 3] cycloaddition of sodium azide with aryl nitriles, aliphatic nitriles, and vinyl nitriles when catalyzed by scandium triflate. The reactions were typically heated for 1 h at 160 °C in a 3:1 isopropanol/water mixture to obtain the best yields
Treatments of various nitriles with TMSN3 and Bu2Sn(OAc)2 at 30 oC in benzene for 60 h yielded the corresponding 5-substituted 1H-tetrazoles in good to excellent yields. This method is a mild and efficient alternative reagent system for Wittenberger tetrazole-synthesis that uses TMSN3 and Bu2SnO in toluene at high temperature (93–110 °C) for 24–72 h.
racemization. 5-Substituted 1H-tetrazoles were effectively synthesized from aldoximes and diphenyl phosphorazidate (DPPA) under reflux conditions in xylenes. Various aldoximes underwent the cycloaddition reaction to afford the corresponding 5-substituted 1H-tetrazoles in short reaction times and in good yields. Chiral aldoximes derived from amino acids also gave aminotetrazoles with almost no racemization.
Antibacterial Assessment of Heteroaryl, Vinyl, Benzyl, and Alkyl Tetrazole Compounds
作者:Joshua Dudley、Liana Feinn、Heather DeFrancesco、Erica Lindsay、Adiel Coca、Elizabeth Lewis Roberts
DOI:10.2174/1573406413666171120162420
日期:2018.7.12
antibacterial properties of certain tetrazole derivatives have been described. We have previously reported the antibacterial properties of aryl 1Htetrazole compounds. Objective: To study the antibacterial activity of 5-substituted heteroaryl, vinyl, benzyl, and alkyl 1H-tetrazole derivatives. Methods: The antibacterial properties of heteroaryl, vinyl, benzylic, and aliphatic tetrazole derivatives were investigated