Copper(II) bromide as efficient catalyst for silyl- to bisarylmethyl ethers interconversion (transprotection)
摘要:
Primary and secondary silylated alcohols are easily converted to bis(methoxyphenyl)methyl (BMPM) ethers in good yields using CuBr2 as catalyst in acetonitrile at room temperature. Various other protecting groups are compatible with this mild and convenient process. (C) 2011 Elsevier Ltd. All rights reserved.
Light-Mediated Reductive Debromination of Unactivated Alkyl and Aryl Bromides
作者:James J. Devery、John D. Nguyen、Chunhui Dai、Corey R. J. Stephenson
DOI:10.1021/acscatal.6b01914
日期:2016.9.2
reduction or atomtransfer is a powerful transformation in the construction of complex molecules. In particular, mild, selective hydrodehalogenations provide an excellent follow-up to the application of halogen atoms as directing groups or the utilization of atomtransfer radical addition (ATRA) chemistry for the production of hydrocarbons. Here we combine the mechanistic properties of photoredox catalysis
Engaging unactivated alkyl, alkenyl and aryl iodides in visible-light-mediated free radical reactions
作者:John D. Nguyen、Erica M. D'Amato、Jagan M. R. Narayanam、Corey R. J. Stephenson
DOI:10.1038/nchem.1452
日期:2012.10
we describe the identification of reaction conditions under which photocatalysts such as fac-Ir(ppy)3 can be utilized to form radicals from unactivated alkyl, alkenyl and aryl iodides. The generated radicals undergo reduction via hydrogen atom abstraction or reductive cyclization. The reaction protocol utilizes only inexpensive reagents, occurs under mild reaction conditions, and shows exceptional
Davies, John S.; Higginbotham, Clement L.; Tremeer, E. John, Journal of the Chemical Society. Perkin transactions I, 1992, # 22, p. 3043 - 3048
作者:Davies, John S.、Higginbotham, Clement L.、Tremeer, E. John、Brown, Charles、Treadgold, Richard C.
DOI:——
日期:——
Copper(II) bromide as efficient catalyst for silyl- to bisarylmethyl ethers interconversion (transprotection)
作者:Simon Specklin、Florian Gallier、Rofia Mezaache、Hassina Harkat、Yénimégué Albert Dembelé、Jean-Marc Weibel、Aurélien Blanc、Patrick Pale
DOI:10.1016/j.tetlet.2011.08.148
日期:2011.11
Primary and secondary silylated alcohols are easily converted to bis(methoxyphenyl)methyl (BMPM) ethers in good yields using CuBr2 as catalyst in acetonitrile at room temperature. Various other protecting groups are compatible with this mild and convenient process. (C) 2011 Elsevier Ltd. All rights reserved.
Defunctionalization of sp<sup>3</sup> C–Heteroatom and sp<sup>3</sup> C–C Bonds Enabled by Photoexcited Triplet Ketone Catalysts
作者:Yiting Gu、Hongfei Yin、Matthew Wakeling、Juzeng An、Ruben Martin
DOI:10.1021/acscatal.1c05329
日期:2022.1.21
defunctionalization of sp3 C–heteroatom and sp3 C–C bonds with tripletketone catalysts and bipyridine additives is disclosed. This protocol is characterized by its broad scope without recourse to transition metal catalysts or stoichiometric exogeneous reductants, thus offering a complementary technique for activating σ sp3 C–C(heteroatom) bonds. Preliminary mechanistic studies suggest that the presence