193743-53-2

Upstream product

• 50-00-0 formaldehyd 
• 103-16-2 4-Benzyloxyphenol 

Downstream Products

• 1350521-15-1 C₁₇₆H₂₂₄O₁₆ 

Relevant academic research and scientific papers

A new positive-type photoresist based on mono-substituted hydroquinone calix[8] arene and diazonaphthoquinone

Mono-substituted hydroquinone calix[8]arenes 1a and lb were synthesized by the debenzylation of O-substituted p-benzyloxyphenol calix[8]arenes which were prepared by the cyclization of p-benzyloxyphenol and paraformaldehyde in the presence of a base, followed by acylation with acetic anhydride or toluene-p-sulfonyl chloride. The calixarenes provide highly transparent films from their solutions in ethyl lactate (EL). A new positive-type photoresist based on the calix[8]arene lb having toluene-p-sulfonate groups as a base- developable matrix and diazonaphthoquinone-4-sulfonate [DNQ(4)] or -5- sulfonate [DNQ(5)] as a photoreactive dissolution inhibitor has been successfully developed. The difference of dissolution rates for this resist system toward 1.5 wt% aqueous tetramethylammonium hydroxide (TMAH) solution reached 1300-5000 times before and after UV radiation (200 mJ cm-2). Thus, the photoresists containing 25 wt% of DNQs showed high sensitivities of 30- 37 mJ cm-2 (D) and contrasts of 2.5-2.8 (γ) when they were exposed to 365 nm light and post-exposure baked (PEB) at 100 °C for 90 s, followed by developing with 1.5 wt% aqueous tetramethylammonium hydroxide (TMAH) solution at room temperature. A fine positive image featuring 1 μm of minimum line and space patterns was also printed on the film which was exposed to 40 mJ cm-2 by the contact mode.

Preparation method of cup [eight] quinone and its application

The present invention discloses a cup [eight] quinone preparation method and its application, the preparation method comprising: 4-benzyloxyphenol and paraformaldehyde under alkaline conditions of condensation reaction to give 4- benzyloxy cup [eight] aro

HIGH-YIELD SYNTHESIS OF P-(BENZYLOXY)CALIX[6, 7,8]ARENES

The high-yield synthesis of p-(benzyloxy)calix[6,7,8]arenes by bringing caesium hydroxide into contact with p-(benzyloxy)phenol and paraformaldehyde, and composite materials including these p-(benzyloxy)calix[6,7,8]arenes.

Matrix-dependent cooperativity in spin crossover Fe(pyrazine)Pt(CN) 4 nanoparticles

Anisotropic nanoparticles of the Fe(pyrazine)Pt(CN)4 network were prepared embedded in various matrices that revealed to have a dramatic effect on the cooperative spin crossover phenomena. By a judicious choice of the nature of the matrix and t

P-(benzyloxy)calix[8]arene synthesis revisited: P-(benzyloxy)calix[4]-, p-(benzyloxy)calix[5]-, p-(benzyloxy)calix[7]-, and p-(benzyloxy)bis(homooxa) calix[4]arenes

A detailed investigation of the 4-(benzyloxy)phenol/formaldehyde reaction shows that along with the previously described p-(benzyloxy)calix[8]arene and p-(benzyloxy)calix[6]arene, others calixarenes are observed and easily recovered on a preparative scale. All these new calixarenes are opening interesting perspectives for the synthesis of new supramolecular hosts, easily functionalized at the para position under very mild conditions and/or exhibiting a deep hydrophobic pocket. During the course of the synthesis of p-(benzyloxy)calix[8]arene, compounds 4-7 are easily recovered as byproducts on a preparative scale. Alkylation of these new calixarenes leads to the first functionalized derivatives.

Preparation of macrocyclon analogues: calix[8]arenes with extended polyethylene glycol chains

A one-pot methodology has been developed for the preparation of macrocyclon mimics, i.e., calix[8]arenes containing hydrophobic alkyl substituents on the upper rim and hydrophilic polyethylene glycol chains on the lower rim. Compounds containing PEG chains of up to 24 repeating ethylene oxide (EO) units can be prepared. With increasing molecular weight, these amphiphilic compounds can be classified as macromolecules, and can be difficult to characterise as single molecules. The limitations of conventional analytical techniques are discussed.

p-(Benzyloxy)calix[8]arene: One-Pot Synthesis and Functionalization

The condensation of hydroquinone monobenzyl ether in the presence of several bases gives a mixture of cyclic oligomers. Using p-benzyloxyphenol, paraformaldehyde, and NaOH in 45:82:1 molar ratio in refluxing xylene, p-(benzyloxy)calix[8]arene (2) was sele