New analogues of cryptopleurine with different aromatic methoxyl and chloro substituents have been synthesized. Intermediate isomeric 1-hydroxyphenanthro[9.10b]quinolizidines have been isolated and characterized. Yields in the Pschorr reaction have been improved by the novel use of sulphite ion. Some of the compounds have been found to have antifungal activity.
已经合成了具有不同的芳族甲氧基和氯取代基的隐叶嘌呤的新类似物。中间异构体1-羟基菲[9.10 b ]喹啉z已被分离和表征。通过新使用亚硫酸根离子可以提高Pschorr反应的收率。已经发现一些化合物具有抗真菌活性。
Kessar, S. V.; Nadir, U. K.; Gupta, Y. P., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 1, p. 1 - 3
作者:Kessar, S. V.、Nadir, U. K.、Gupta, Y. P.、Pahwa, P. S.、Singh, Paramjit
DOI:——
日期:——
Pschorr; Wolfes; Buckow, Chemische Berichte, 1900, vol. 33, p. 165
作者:Pschorr、Wolfes、Buckow
DOI:——
日期:——
Soluble Catalysts for Improved Pschorr Cyclizations
作者:Frederick W. Wassmundt、William F. Kiesman
DOI:10.1021/jo00106a034
日期:1995.1
Several improved catalysts for the Pschorr phenanthrene synthesis have been discovered; all are soluble substances which initiate free-radical reactions by electron donation and thereby shorten the reaction time and increase the yield. One technique with K4Fe(CN)(6) in water produced phenanthrene-9-carboxylic acid (6a) in 87% yield, but its application did not extend to substituted examples where the diazonium salt is less soluble in water. A more general procedure with ferrocene in acetone produced not only 6a but also substituted examples 6b-f in yields of 88-94%. A modification which avoids the isolation of diazonium salts was developed for occasional synthetic use.
KESSAR, S. V.;NADIR, U. K.;GUPTA, Y. P.;PAHWA, P. S.;SINGH, PARAMJIT, INDIAN J. CHEM., 1981, 20, N 1, 1-3
作者:KESSAR, S. V.、NADIR, U. K.、GUPTA, Y. P.、PAHWA, P. S.、SINGH, PARAMJIT