An Improved Oxidation Method for the Synthesis of Azodicarbonyl Compounds
作者:Jeremy T. Starr、Gurdev S. Rai、Hung Dang、Brian J. McNelis
DOI:10.1080/00397919708004179
日期:1997.9
Abstract Five representative hydrazo compounds have been oxidized in high yield using Br2 and pyridine. Yields range from 80% to 93%. For the synthesis of dibenzyl azodicarboxylate, this process produced analytically pure material directly from the reaction mixture.
Synthesis and ene reactions of di-(−)-menthyl diazenedicarboxylate
作者:Margaret A. Brimble、Clayton H. Heathcock、Gregory N. Nobin
DOI:10.1016/0957-4166(96)00242-x
日期:1996.7
Trans-3-hexene 4 and trans-4-octene 6 afforded the ene adducts 5 (80%) and 7 (70%) with a diastereomeric excess of 2.5:1 and 2:1 respectively. Use of cyclohexene 8 and cyclopentene 10 afforded the ene adducts 9 and 11 in 81% and 88% yield, however, no diastereomeric excess was observed. Finally use of conjugated aromatic acyclic alkenes 12 and 14 afforded the chlorides 13 and 15 in 93% and 56% yield respectively