One-pot synthesis of pyridines from 3-aza-1,5-enynes
摘要:
Efficient one-pot transformation of 3-aza-1,5-enynes to poly-substituted pyridines in good to excellent yields has been developed. This reaction involved cyclization of 3-aza-enynes and elimination of sulfinyl acids steps. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis of Polyfluoroalkyl Cyclobutenes from 3-Aza-1,5-enynes via an Aza-Claisen Rearrangement/Cyclization Cascade
作者:Xiaoyi Xin、Dongping Wang、Fan Wu、Chunxiang Wang、Haolong Wang、Xincheng Li、Boshun Wan
DOI:10.1021/ol4020738
日期:2013.9.6
A facile synthetic route to access polyfluoroalkyl functionalized cyclobutenes bearing an exo cyclic double bond from 3-aza-1,5-enynes is reported. The reaction proceeds via a thermal aza-Claisen rearrangement to give an allene-imine intermediate; subsequent cyclization affords the cyclobutene core. The kinetics of the transformation of starting material and the intermediate was studied by 1H NMR spectroscopy
报道了一种容易的合成路线,该路线可从3-氮杂-1,5-烯炔中获得带有外环双键的多氟烷基官能化的环丁烯。反应通过热氮杂-克莱森重排进行,得到烯丙基-亚胺中间体;随后环化得到环丁烯核。通过1 H NMR光谱研究了起始原料和中间体的转化动力学,其中揭示了连续的反应。
Alkynyl Borrowing: Silver-Catalyzed Amination of Secondary Propargylic Alcohols via C(sp<sup>3</sup>)–C(sp) Bond Cleavage
作者:Xin Zhuang、Min Zhu、Chuan-Ming Hong、Zhen Luo、Wan-Fang Li、Qing-Hua Li、Qun-Li Luo、Tang-Lin Liu
DOI:10.1021/acs.joc.2c00297
日期:2022.4.15
The silver-catalyzed alkynyl borrowing amination of secondary propargyl alcohols via C(sp3)–C(sp) bond cleavage has been developed. This new strategy was based on the β-alkynyl elimination of propargyl alcohols and alkynyl as the borrowing subject. This alkynyl borrowing amination featured high atom economy, wide functional group tolerance, and high efficiency.