On-column N-dearylation of 2-azetidinones by silica-supported ceric ammonium nitrate
摘要:
A modified traditional preparative chromatographic column can be used to achieve quantitative N-dearylation of N-(alkoxyphenyl), N-(alkoxynaphthyl), and N-(alkoxybenzyl)-2-azetidinones under mild conditions. Starting materials are charged on top of the column and the pure N-unsubstituted 2-azetidinones leave the column minutes later without need for other purifications. The yields are good-to-excellent and the reaction condition is mild, easy, efficient, and cheap. (c) 2012 Elsevier Ltd. All rights reserved.
Synthesis of Some New Mono- and Bis-Polycyclic Aromatic Spiro and Bis-Nonspiro-β-Lactams
作者:Aliasghar Jarrahpour、Edris Ebrahimi
DOI:10.3390/molecules15010515
日期:——
Some new mono-and bis-polycyclic aromatic spiro-beta-lactams and bis-non spiro-polycyclic aromatic beta-lactams have been synthesized from imines derived from anthracene-9-carbaldehyde, 2-naphtaldehyde and a ketene derived from 9H-xanthene-9-carboxylic acid and phenoxyacetic acid by a [2+2] cycloaddition reaction. The cycloadducts were characterized by spectral data, including 1H-NMR, 13C-NMR, IR and
一些新的单和双多环芳族螺-β-内酰胺和双-非螺-多环芳族β-内酰胺已由蒽-9-甲醛、2-萘醛和9H-呫吨衍生的乙烯酮合成。 9-羧酸和苯氧乙酸通过[2+2]环加成反应。环加合物通过光谱数据表征,包括 1H-NMR、13C-NMR、IR 和元素分析。这些单螺-β-内酰胺中的一些的构型是通过 X 射线晶体分析建立的。
On-column N-dearylation of 2-azetidinones by silica-supported ceric ammonium nitrate
作者:Maaroof Zarei、Aliasghar Jarrahpour、Edris Ebrahimi、Malihe Aye、Seid Ali Torabi Badrabady
DOI:10.1016/j.tet.2012.04.088
日期:2012.7
A modified traditional preparative chromatographic column can be used to achieve quantitative N-dearylation of N-(alkoxyphenyl), N-(alkoxynaphthyl), and N-(alkoxybenzyl)-2-azetidinones under mild conditions. Starting materials are charged on top of the column and the pure N-unsubstituted 2-azetidinones leave the column minutes later without need for other purifications. The yields are good-to-excellent and the reaction condition is mild, easy, efficient, and cheap. (c) 2012 Elsevier Ltd. All rights reserved.