216581-21-4

Upstream product

• 91-01-0 1,1-Diphenylmethanol 
• 110-63-4 Butane-1,4-diol 
• 123-11-5 4-methoxy-benzaldehyde 
• 7598-80-3 4-phenylbenzhydrol 
• 720-44-5 1-(4-methoxyphenyl)-1-phenylmethanol 
• 693272-46-7 4-[(4-benzhydryloxy-butoxy)-phenyl-methyl]-biphenyl 
• 693272-45-6 1-[(4-Benzhydryloxy-butoxy)-phenyl-methyl]-4-methoxy-benzene 

Downstream Products

• 693272-45-6 1-[(4-Benzhydryloxy-butoxy)-phenyl-methyl]-4-methoxy-benzene 
• 693272-46-7 4-[(4-benzhydryloxy-butoxy)-phenyl-methyl]-biphenyl 

Relevant academic research and scientific papers

Yb(OTf)3/FeCl3 mediated facile conversion of alcohols, ketals and acid sensitive ethers into diphenylmethyl (DPM) ethers

10 mol% Yb(OTf)3 or FeCl3 have been developed as efficient reagents for the conversion of alcohols into diphenylmethyl (DPM) ethers. Similarly, FeCl3 has also been advantageously utilised to successfully convert ketals and

Influence of the side-chain structure and molecular weight on the re-entrant behaviors of mesogen-jacketed liquid crystalline polymers

Three series of mesogen-jacketed liquid crystalline polymers (MJLCPs) containing different terminal groups (phenmethyl, diphenylmethyl and triphenylmethyl) in the side chains, abbreviated as Pv-m-Bn, Pv-m-DPM, Pv-m-Tr (m = 2, 4, 6, 8, 10, and 12, which are the number of methylene units between the terephthalate core and terminal groups in the side chains), were designed and successfully synthesized via free-radical polymerization. Molecular characterization of the polymers was performed by 1H NMR, GPC and TG analysis. The phase structures and transitions of the polymers were investigated by a combination of techniques including DSC, POM and 1D/2D WAXD. The experimental results revealed that all the polymers exhibited excellent thermal stabilities and the re-entrant behaviors of the MJLCPs were found to be strongly dependent on the structure of the side-chain, i.e., the spacer length increased with the volume of the terminal groups when the polymers exhibited the re-entrant isotropic phase. On the other hand, a series of MJLCPs, poly{2,5-bis[(diphenylmethoxy-ethyl)oxycarbonyl]-styrenes} (Pv-2-DPMs), with different molecular weights (Mn) and narrow Mn distributions have been successfully synthesized via ATRP. The results indicated that when the Mn was below 1.73 × 104 g mol-1, only the isotropic phase was observed. When Mn was between 3.40 × 104 g mol-1 and 8.48 × 104 g mol-1, a re-entrant isotropic phase was formed at low temperatures and a columnar nematic phase at high temperatures. By further increasing the Mn to exceed 9.71 × 104 g mol-1, a stable columnar nematic phase was developed. This work provides two effective ways to design and synthesize MJLCPs with re-entrant behaviors; moreover, it is meaningful to deeply understand the structure-property relationships of MJLCPs.

PdCl2, a useful catalyst for protection of alcohols as diphenylmethyl (DPM) ethers

Primary, secondary, benzylic and allylic alcohols are efficiently converted to the corresponding diphenylmethyl ethers in the presence of catalytic amounts of PdCl2.

p-Methoxy Diphenylmethanol (MDPM), p-Phenyl Diphenylmethanol (PDPM), and p-Phenylphenyl Diphenylmethanol (PPDPM) - Protecting Groups for Alcohols - Protection and Deprotection

Two new protecting groups viz. p-phenyl diphenylmethanol (PDPM) and p-phenylphenyl diphenylmethanol (PPDPM) were prepared and utilized along with p-methoxy diphenylmethanol (MDPM), for the protection of alcohols in the presence of Yb(OTf)3. Deprotection of the above ethers was achieved using DDQ or CF3COOH.