Gold Catalysis: Non-Spirocyclic Intermediates in the Conversion of Furanynes by the Formal Insertion of an Alkyne into an Aryl-Alkyl CC Single Bond
作者:A. Stephen K. Hashmi、Tobias Häffner、Weibo Yang、Sreekumar Pankajakshan、Sascha Schäfer、Lara Schultes、Frank Rominger、Wolfgang Frey
DOI:10.1002/chem.201200306
日期:2012.8.20
It takes al‐kynes: The formation of furyl‐substituted heterocycles from furanynes with donor groups on the furan–alkyne tether and mechanistic control experiments indicate the involvement of open‐chained carbenium ions in the overall insertion of an alkyne into a CCbond, rather than the usual spirocyclic intermediates (see scheme).
A General Synthetic Route to Isomeric Pyrrolo[1,2-<i>x</i>][1,4]diazepinones
作者:Elena Y. Zelina、Tatyana A. Nevolina、Ludmila N. Sorotskaja、Dmitry A. Skvortsov、Igor V. Trushkov、Maxim G. Uchuskin
DOI:10.1021/acs.joc.8b01669
日期:2018.10.5
A simple one-pot method for the synthesis of isomeric pyrrolo[1,2-x][1,4]diazepinones in reasonable yields was developed. The method is based on the condensation of readily available N-Boc amino acids with biomass-derived furans containing aminoalkyl groups followed by deprotection, furan ring opening, and Paal–Knorr cyclization. Using this approach, we synthesized pyrrolo[1,2-a][1,4]diazepin-3(2H)-ones
开发了一种简单的一锅法,以合理的产率合成吡咯并[1,2- x ] [1,4]二氮杂ze酮。该方法基于容易获得的N- Boc氨基酸与生物质衍生的含氨基烷基的呋喃的缩合,然后进行脱保护,呋喃开环和Paal-Knorr环化。使用这种方法,我们从糠胺和β-氨基酸和吡咯并[1,2- d ] [1,4]二氮杂合成了吡咯并[1,2- a ] [1,4]二氮杂-3(2 H)-来自2-(2-呋喃基)乙胺和α-氨基酸的-4(5 H)-1。研究了合成的吡咯并二氮杂酮的细胞毒性。
A Route to (Het)arene-Annulated Pyrrolo[1,2-<i>d</i>][1,4]diazepines via the Expanded Intramolecular Paal–Knorr Reaction: Nitro Group and Furan Ring as Equivalents of Amino Group and 1,4-Diketone
作者:Elena Y. Zelina、Tatyana A. Nevolina、Dmitry A. Skvortsov、Igor V. Trushkov、Maxim G. Uchuskin
DOI:10.1021/acs.joc.9b01925
日期:2019.11.1
A straightforward protocol toward pharmacologically relevant (het)areno[x,y-b]pyrrolo[1,2-d][1,4]diazepines in good to high yields has been described. The designed approach consists of an acid-promoted furan ring opening in easily accessible N-(2-furylethyl)-2-nitroanilines or their heterocyclic analogues followed by the reductive cyclization of the corresponding nitro-1,4-diketones.