57100-83-1Relevant academic research and scientific papers
METHOD FOR PRODUCING BISPHENOL COMPOUND
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Paragraph 0092; 0095; 0101, (2020/11/24)
PROBLEM TO BE SOLVED: To provide a method for producing an aldehyde bisphenol compound, which makes it possible to produce a 4,4'-substituted body with significantly high regioselectivity in an efficient and easy manner. SOLUTION: A production method includes producing a bisphenol compound represented by the formula (1) in a state in which at least phenol, heteropoly acid, and a trioxane compound such as paraldehyde coexist. [In formula (1), R1 is a hydrogen atom or a C1-29 monovalent organic group. R2 and R3 each denote a halogen atom or a C1-29 monovalent organic group. a and b each denote an integer of 0-4]. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
Aromatics to bis-triquinane: A tandem oxidative dearomatization of bis-phenol, cycloaddition, photorearrangement and a rapid entry into carbocyclic framework of Xeromphalinone e
Singh, Deepak,Chaudhari, Umesh V.,Deota, Pradeep T.
, p. 4485 - 4493 (2014/06/10)
A novel approach for the synthesis of a bird-shaped bis-triquinane 3, a fascinating carbocyclic framework closely related to the skeleton of Xeromphalinone E 1 from readily available 2,6-dimethyl phenol 8 has been reported. The synthesis of bis-cyclohexadienones 6, 22a-e by oxidative acetylation of tetramethyl bisphenols 7, 20a-e has been investigated using two different reagents under varying reaction conditions. The cycloaddition of bis-cyclohexadienone 6 gives two carbocycles, bis-adduct 4b and mono-adduct 5d in a stereocontrolled manner. The photochemical sigmatropic 1,2-acyl shift in 4b furnished 3 and monotriquinane 9 linked with a 9-acetoxy-9-methyl-endo- tricyclo[5,2,2,02,6]undeca-4,10-diene-8-one system. Two different pentasubstituted phenols 13 and 14 were also isolated during an attempted oxa-di-π-methane (ODPM) rearrangement of mono-adduct 5d via aromatisation of the cyclohexadienone ring. The photochemical behaviour of bis-cyclohexadienones 6, 22a-e has also been investigated under UV irradiation and two different aromatized products were isolated for each bis-cyclohexadienone by migration and elimination of acetate groups.
