C–H/N–H cross-coupling has become a key technology for the selective conjugation of azole drugmolecules. However, the development of new synthetic models and green chemical methods is imperative to enhance the construction of multi-functional compounds and compounds with unique functional groups. We herein reported an electrochemical synthesis of α-tetrazolyl ketones with excellent yields and broad
A simple chemoenzymatic method for the preparation of optically active (5-aryltetrazolyl-2)-4-butan-2-ol, (5-aryltetrazolyl-2)-propan-2-ol, and their acetates has been developed. The starting compounds (5-aryltetrazolyl-2)-4-butan-2-one and (5-aryltetrazolyl-2)-propan-2-one were obtained by a Michael-type addition of 5-aryl substituted tetrazoles to methyl vinyl ketone, and alkylation of 5-aryl substituted tetrazoles with chloroacetone, respectively. Their reduction with sodium borohydride afforded racemic mixtures of (5-aryltetrazolyl-2)-4-butan-2-oles and (5-aryltetrazolyl-2)-propan-2-oles. (C) 2012 Elsevier Ltd. All rights reserved.
5-phenyl-2H-tetrazol-2-ylmethyl ketones in the synthesis of tetrazolylalkanols and tetrazolyl(hydroxy)alkylphosphonates
作者:A. S. Krylov、A. V. Dogadina、R. E. Trifonov
DOI:10.1134/s1070428014060219
日期:2014.6
ne and 1-phenyl-2-(5-phenyl-2H-tetrazol-2-yl)ethanone with sodium tetrahydridoborate gave 1-(5-phenyl-2H-tetrazol-2-yl)propan-1-ol and 1-phenyl-2-(5-phenyl-2H-tetrazol-2-yl)ethanol, respectively. Only 1-(5-phenyl-2H-tetrazol-2-yl)propan-2-one was reduced with baker’s yeast with an appreciable yield. 1-(5-Phenyl-2H-tetrazol-2-yl)propan-2-one and 1-phenyl-2-(5-phenyl-2H-tetrazol-2-yl)ethanone reacted
The reaction of 2-[(trimethylsilyl)methyl]-2 H -tetrazoles with various alkyl halides and carbonates using n -butyllithium or lithium diisopropylamide (LDA) gave 2-[1-(trimethylsilyl)alkyl]-2 H -tetrazoles and (2 H -tetrazol-2-yl)acetates as useful synthons of modified tetrazoles.