cas 87-18-3, SALICYLIC ACID 4-TERT-BUTYLPHENYL ESTER | Articles data ｜lookchem

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87-18-3

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N-Heterocyclic carbene/photo-cocatalyzed oxidative Smiles rearrangement: Synthesis of aryl salicylates from: O -aryl salicylaldehydes
The N-heterocyclic carbene/photo-cocatalyzed oxidative Smiles rearrangement of O-aryl salicylaldehydes was developed. Both electron-deficient and electron-rich aryls worked well as migrating groups, giving the corresponding aryl salicylates in good yields. This reaction features formation of two new C-O bonds and one C-O bond cleavage via metal-free oxidation of the Breslow intermediate using oxygen as the terminal oxidant and following the Smiles rearrangement under photocatalysis.
Xia, Zi-Hao,Dai, Lei,Gao, Zhong-Hua,Ye, Song
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p. 1525 - 1528
(2020/02/13)

Efficient Aryl Migration from an Aryl Ether to a Carboxylic Acid Group To Form an Ester by Visible-Light Photoredox Catalysis
We have developed a highly efficient aryl migration from an aryl ether to a carboxylic acid group through retro-Smiles rearrangement by visible-light photoredox catalysis at ambient temperature. Transition metals and a stoichiometric oxidant and base are avoided in the transformation. Inspired by the high efficiency of this transformation and the fundamental importance of C?O bond cleavage, we developed a novel approach to the C?O cleavage of a biaryl ether to form two phenolic compounds, as demonstrated by a one-pot, two-step gram-scale reaction under mild conditions. The aryl migration exhibits broad scope and can be applied to the synthesis of pharmaceutical compounds, such as guacetisal. Primary mechanistic studies indicate that the catalytic cycle occurs by a reductive quenching pathway.
Wang, Shao-Feng,Cao, Xiao-Ping,Li, Yang
p. 13809 - 13813
(2017/10/24)

Piperidyl organosiloxanes and polymer substrates light-stabilized therewith
Novel piperidyl organosiloxanes, well adapted for the light/UV-stabilization of a wide variety of polymer substrates, e.g., polyolefins and polyalkadienes, have the structural formula (I): STR1
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(2008/06/13)

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90-47-1
xanth-9-one

Chemical Properties

Melting Point: 63°C
Boiling Point: 373.44°C (rough estimate)
Density: 1.1141 (rough estimate)
Refractive Index: 1.5490 (estimate)
PKA: 7.93±0.30(Predicted)
Merck: 14,1586
PSA: 46.53000
LogP: 3.90890

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