The reduction of organic halides with tributyltin hydride in the presence of a catalytic amount of triethylborane has been studied. (1) Alkyliodides and alkyl bromides reacted easily with tin hydride at −78°C to give the corresponding hydrocarbons, while alkyl chlorides were sluggish to react and recovered unchanged. (2) The reduction of alkenyl halides such as 1-deuterio-1-iodo-1-dodecene and 1-
Cobalt-Catalyzed Markovnikov Selective Sequential Hydrogenation/Hydrohydrazidation of Aliphatic Terminal Alkynes
作者:Jieping Chen、Xuzhong Shen、Zhan Lu
DOI:10.1021/jacs.0c07258
日期:2020.8.26
pot. A cobalt hydride species was employed as two roles for both a unique metal-catalyzed Markovnikov-type insertion of the aliphatic terminal alkynes and then metal-catalyzedhydrogen atom transfer of alkenes. This operationally simple protocol exhibits excellent functional group tolerance and step economy. The hydrazone products could be easily transferred to various valuable amine derivatives.
The mild and efficient deuteration method of terminal alkynes using a reusable anion exchange resin in D2O has been developed.
使用可重复利用的阴离子交换树脂在D2O中开发了一种温和高效的末端炔烃氘代方法。
Rhenium-Catalyzed<i>anti</i>-Markovnikov Addition Reaction of Methanetricarboxylates to Unactivated Terminal Acetylenes
作者:Shunsuke Hori、Masahito Murai、Kazuhiko Takai
DOI:10.1021/ja5090755
日期:2015.2.4
anti-Markovnikov addition reaction of methanetricarboxylates with terminal acetylenes under neutral conditions was achieved using a rhenium complex. This transformation represents a rare example of intermolecular anti-Markovnikov addition of carbon nucleophiles to unactivated terminal acetylenes. 1,3-Diesters having bulky substituents at the active methylene carbon are also applicable as substrates to provide anti-Markovnikov
Preparation, Structure, and Reactivity of Pseudocyclic β‐Trifluorosulfonyloxy Vinylbenziodoxolone Derivatives
作者:Akira Yoshimura、Christopher D. Huss、Mackenzie Liebl、Gregory T. Rohde、Scott M. Larson、Gunnar B. Frahm、Mattew W. Luedtke、Tanner J. Schumacher、Zachary S. Gardner、Viktor V. Zhdankin、Pavel S. Postnikov、Mekhman S. Yusubov、Tsugio Kitamura、Akio Saito
DOI:10.1002/adsc.202100341
日期:2021.7
azide anion leads to β-azido vinylbenziodoxolones as products of vinylic nucleophilic substitution in which addition-elimination reactions occur and the double bond configuration is retained. The structures of β-trifluorosulfonyloxy vinylbenziodoxolone and β-azido vinylbenziodoxolone were established by single crystal X-ray diffraction.