Gas-phase deuterium exchange of fluorenes, furans, and thiophenes in the inlet system of a gas chromatograph/mass spectrometer
摘要:
Reaction columns containing a packing of KOD or D3PO4 in a stationary liquid phase on a support as components in a gas chromatograph/mass spectrometer were shown to provide selective basic H/D exchange of fluorenes and furans and acidic H/D exchange of thiophenes under gas-phase conditions. Such columns were proposed for use in the study of fragmentation mechanisms and establishment of the position of substituents in the ring.
使用苯基-,4-甲基苯基-和4-甲氧基-苯基锂试剂将一系列酰基杂环进行串联芳基化还原,然后将锂-氨-氯化铵还原,得到相应的苄基杂环。在这项研究中调查的酰基杂环化合物包括呋喃,2,3-二氢-4 H -1-苯并吡喃,4 H -1-苯并吡喃,噻吩,4,5,6,7-四氢苯并[ b ]噻吩,2,3-二氢-4 H -1-苯并噻喃和吡啶核。除了2,3-二氢-4 H -1-苯并噻吩并-4-酮外,所有酰基杂环均产生相应的苄基杂环,其在还原过程中选择性裂解,得到相应的2-(1-芳基丙基)苯硫醇。
Dinuclear Iron Complex-Catalyzed Cross-Coupling of Primary Alkyl Fluorides with Aryl Grignard Reagents
作者:Zhenbo Mo、Qiang Zhang、Liang Deng
DOI:10.1021/om300722g
日期:2012.9.24
Iron-catalyzed cross-coupling of nonactivated primary alkylfluorides with aryl Grignardreagents has been achieved by using the low-coordinate dinuclear iron complex [(IPr2Me2)Fe(μ2-NDipp)2Fe(IPr2Me2)] as the catalyst. This iron-catalyzed C(sp3)–F bond arylation reaction is applicable to a variety of aryl Grignardreagents and primary alkylfluorides. The product pattern suggests the involvement of a