5374-06-1Relevant articles and documents
Starnes et al.
, p. 1124,1125, 1126 (1975)
Alkylation of resorcinol with tertiary butanol over zeolite catalysts: Shape selectivity vs acidity
Marakatti, Vijaykumar S.,Gaigneaux, Eric M.
, (2021/02/27)
The catalytic performance of various zeolites such as H-ZSM-5, H-Y, H-beta, H-Mordenite in resorcinol alkylation with tertiary butanol demonstrated that pore characteristics have major influence on product selectivity, whereas acid strength and number of acid sites influenced resorcinol conversion. The passivation of external surface of H-beta zeolite by silylation and amine poisoning produced shape selectively O-alkylated resorcinol methyl tert butyl ether (RMTBE) and 4-tert butyl resorcinol (4-TBR). We propose that 4-TBR formation goes over external acid sites through RMTBE isomerization, whereas formation of 4-TBR takes place inside the pores through direct C-alkylation mechanism.
Synthesis method of novel large-steric-hindrance biphenol skeleton and tridentate phosphite ligand thereof
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Paragraph 0029-0032, (2021/02/10)
The invention discloses a synthesis method of a novel large-steric-hindrance biphenol skeleton 2, 2', 6-trihydroxy-3, 3', 5, 5'-tetra-tert-butyl-1, 1'-biphenyl and a tridentate phosphite ligand thereof. The novel biphenyl tridentate phosphite ligand has a structure as shown in a general formula I, and a substituent R in the general formula I can be a cyclic phosphine structure. The novel biphenyltridentate phosphite ligand has good conversion rate and normal-to-isomeric ratio in a mixed/etherified C4(butylene) hydroformylation reaction system.
Biphenyltridentate phosphite ligand and preparation method and application thereof (by machine translation)
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Paragraph 0096-0100, (2020/11/10)
The invention discloses a biphenyl tridentate phosphite ligand and a preparation method and application thereof, wherein the biphenyltridentate phosphite ligand has the structure shown in a formula (I), and the ligand has extremely stable water oxygen. The catalyst is not easy to decompose and has good catalytic activity. (by machine translation)