New One-Carbon Degradative Transformation of β-Alkyl-β-azido Alcohols
摘要:
A new transformation of 2-azido-l-hydroxy-containing compounds to nitriles with one carbon less than the starting materials by oxidation was reported. The reaction can be performed under mild conditions.
hydroboration of nitriles and imines is attained using pinacolborane with unprecedented catalytic efficiency. Chemoselective hydroboration of nitriles over esters is also demonstrated. A simple [Ru(p-cymene)Cl2]2complex (1) is used as a catalyst precursor, which upon reaction with pinacolborane in situ generates the monohydrido-bridged complex [(η6-p-cymene)RuCl}2(μ-H-μ-Cl)] 2. Further oxidative addition
使用频哪醇硼烷以前所未有的催化效率实现了钌催化的腈和亚胺的硼氢化。还证明了腈对酯的化学选择性氢硼化。一个简单的[Ru(p -cymene)氯2 ] 2配合物(1)被用作催化剂前体,其在与频哪醇反应原位生成monohydrido桥连络合物[(η 6 - p -cymene)的RuCl} 2((μ-H-μ-Cl)] 2。将松果硼烷进一步氧化添加到中间体2中建议导致单核氢化钌物质的形成。反应混合物的质谱分析和与膦连接的钌配合物的独立实验表明,单核钌中间体参与了催化循环。提出从钌中心到配位的腈和硼酸酯亚胺配体的连续分子内1,3-氢化物转移,导致还原并导致形成二硼酸酯,是一种可能的反应机理。
C<sub>sp3</sub>–H Imination Using Arylazo Sulfone as a N Source: An Approach to Access Imines
Baker et al., Journal of the Chemical Society, 1953, p. 1852,1856
作者:Baker et al.
DOI:——
日期:——
New One-Carbon Degradative Transformation of β-Alkyl-β-azido Alcohols
作者:Qiu-Hua Fan、Nan-Ting Ni、Qin Li、Li-He Zhang、Xin-Shan Ye
DOI:10.1021/ol0601996
日期:2006.3.2
A new transformation of 2-azido-l-hydroxy-containing compounds to nitriles with one carbon less than the starting materials by oxidation was reported. The reaction can be performed under mild conditions.