Visible-Light-Promoted Metal-Free Aerobic Hydroxyazidation of Alkenes
作者:Bo Yang、Zhan Lu
DOI:10.1021/acscatal.7b02892
日期:2017.12.1
A highly efficient visible-light-promoted metal-free aerobic hydroxyazidation of alkenes has been developed. This protocol was operationally simple with broad substrate scope using relatively simple and readily available starting materials, such as alkenes and air, to construct valuable β-azido alcohols which are significant building blocks to build N-containing compounds. The distinct possible mechanisms
reagents to improve the chemoselectivity. To overcome the above problems, we present a photochemical hydroxyazidation of alkenes via Mn-mediated ligand-to-metal charge transfer (LMCT) in O2, which activates N3– to •N3 and incorporates O2 to be used as an oxygen source in the hydroxyazidation products. Broad alkene range and step-economy chemistry for the hydroxyazidation transformation were also demonstrated
最先进的烯烃羟基叠氮化策略,产生β-叠氮醇和β-叠氮过氧化物的混合物,必须依靠膦试剂来提高化学选择性。为了克服上述问题,我们提出了一种通过 O 2中锰介导的配体到金属电荷转移 (LMCT) 进行烯烃的光化学羟基叠氮反应,将 N 3 –活化为•N 3并结合 O 2用作氧来源为羟基叠氮化产物。还证明了羟基叠氮化转化的广泛烯烃范围和步骤经济化学。
A facile synthesis of (R)-(−)-2-azido-1-arylethanols from 2-azido-1-arylketones using baker's yeast
A novel and efficient stereoselective reduction of 2-azido-1-aryl ketones using baker's yeast is described. (C) 2001 Published by Elsevier Science Ltd. All rights reserved.