Iron-catalysed alkene and heteroarene H/D exchange by reversible protonation of iron-hydride intermediates
作者:Luke Britton、Jamie H. Docherty、Jan Sklyaruk、Jessica Cooney、Gary S. Nichol、Andrew P. Dominey、Stephen P. Thomas
DOI:10.1039/d2sc03802a
日期:——
C–H activation reactions has emerged, the isolation, characterisation and mechanistic understanding of these processes remain lacking. Herein the iron-catalysed C(sp2)–H bond hydrogen/deuterium exchange reaction using CD3OD is reported for both heterocycles and, for the first time, alkenes (38 examples). Isolation and characterisation, including by single-crystal X-ray diffraction, of the key iron-aryl
C-H 官能化反应为分子构建和多样化提供了一种可持续的方法。然而,这些反应仍然以贵金属催化为主。虽然人们对铁催化的 C-H 活化反应产生了浓厚的兴趣,但仍然缺乏对这些过程的分离、表征和机理理解。在此,使用 CD 3的铁催化的 C(sp 2 )-H 键氢/氘交换反应OD 报道了杂环和烯烃的首次报道(38 个例子)。关键的铁芳基和铁烯基 C-H 金属化中间体的分离和表征,包括通过单晶 X 射线衍射,为活性氢化铁催化剂的可逆质子化提供了证据。对于两种底物类别都观察到良好的化学选择性。开发的程序与以前使用 C 6 D 6、D 2或 D 2 O 作为氘源的铁催化 H/D 交换方法正交,并且仅使用工作稳定的试剂,包括铁 ( II) 预催化剂。此外,报道了一种新的氢化铁形成机制,其中β-氢化物从醇中消除产生氢化铁。生产、分离和表征由 C-H 活化产生的有机金属产品的能力为未来的发现和开发奠定了基础。
Photoinduced alkylation of five-membered heteroaromatic compounds via electron-transfer reaction: heterodimer cation radical intermediacy
作者:Kazuhiko Mizuno、Masao Ishii、Yoshio Otsuji
DOI:10.1021/ja00408a050
日期:1981.9
First Exclusive Regioselective Fragmentation of Primary Ozonides Controlled by Remote Carbonyl Groups and a New Method for Determining the Regiochemistry of Carbonyl Oxide Formation
作者:Hsien-Jen Wu、Chu-Chung Lin
DOI:10.1021/jo952284p
日期:1996.1.1
The first exclusive regioselective fragmentation of primaryozonides controlled by remote carbonyl groups on ozonolysis of norbornene derivatives and reaction of final ozonides with triethylamine as a new probe for determining the regiochemistry of carbonyl oxide formation from primaryozonide fragmentation are reported. Ozonolysis of the endo adducts 3a-d and the deuterated compounds 8a and 8b in
The occurrence of an hydride shift in the aromatisation of 1,4-epoxy-1,4-dihydronaphthalenes
作者:Michael D. Cooke、Trevor A. Dransfield、John M. Vernon
DOI:10.1039/p29840001377
日期:——
The acid-catalysed aromatisation of [1,4-2H2]- 1,4-epoxy-1,4-dihydronaphthalene and [4-2H]-1,4-epoxy-1-methyl-1,4-dihydronaphthalene is shown to result in partial retention of deuterium at the 2-position of 1-naphthol and 4-methyl-1-naphthol, respectively.
[1,4- 2 H 2 ] -1,4-环氧-1,4-二氢萘和[4- 2 H] -1,4-环氧-1-甲基-1,4-二氢萘的酸催化芳构化结果表明,氘导致氘分别保留在1-萘酚和4-甲基-1-萘酚的2-位。