3,4-Dihydro-2,4-diphenyl-2H-1-benzopyran

Base Information

• Chemical Name: 3,4-Dihydro-2,4-diphenyl-2H-1-benzopyran
• CAS No.: 55256-25-2
• Molecular Formula: C₂₁H₁₈O
• Molecular Weight: 286.373
• Hs Code.: 2932999099
• Mol file: 55256-25-2.mol

Synonyms:2H-1-Benzopyran, 3, 4-dihydro-2,4-diphenyl-;2H-1-Benzopyran, 2,3-dihydro-2,4-diphenyl-;2,4-Diphenyl-3,4-dihydro-2H-chromene;

Chemical Property of 3,4-Dihydro-2,4-diphenyl-2H-1-benzopyran

Chemical Property:

• Vapor Pressure: 7.17E-07mmHg at 25°C
• Refractive Index: 1.612
• Boiling Point: 419.9 °C at 760 mmHg
• Flash Point: 206.9 °C
• PSA: 9.23000
• Density: 1.12 g/cm³
• LogP: 5.34230

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

Technology Process of 3,4-Dihydro-2,4-diphenyl-2H-1-benzopyran

There total 23 articles about 3,4-Dihydro-2,4-diphenyl-2H-1-benzopyran which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 90.0%

C21H18O2 → (2S,4R)-2,4-diphenylchromane (55256-25-2,58530-40-8,58530-42-0,130444-79-0)

Guidance literature:

With triethylsilane; boron trifluoride diethyl etherate; In dichloromethane; at -78 ℃; for 1h;

DOI:10.1039/c9gc02420d

Reference yield: 81.0%

styrene (100-42-5,25038-60-2,25247-68-1,28213-80-1,28325-75-9,79637-11-9,9003-53-6) + (phenylmethylene)bis(oxy)dibenzene (35822-60-7) → 2,4-diphenylchroman (55256-25-2,58530-40-8,58530-42-0,130444-79-0) + cis-2,4-diphenylchroman (55256-25-2,58530-40-8,58530-42-0,130444-79-0)

Guidance literature:

With [Au(2,6-bis(diisopropylphenyl)imidazol-2-ylidene)]SbF₆; In dichloromethane; at -20 ℃; for 2h; Solvent; Temperature; Reagent/catalyst; diastereoselective reaction; Inert atmosphere;

DOI:10.1002/chem.201403285

Reference yield: 81.0%

styrene (100-42-5,25038-60-2,25247-68-1,28213-80-1,28325-75-9,79637-11-9,9003-53-6) + (phenylmethylene)bis(oxy)dibenzene (35822-60-7) → 2,4-diphenylchroman (55256-25-2,58530-40-8,58530-42-0,130444-79-0) + cis-2,4-diphenylchroman (55256-25-2,58530-40-8,58530-42-0,130444-79-0)

Guidance literature:

With [Au(2,6-bis(diisopropylphenyl)imidazol-2-ylidene)]SbF₆; In dichloromethane; at -20 ℃; for 2h; Solvent; Temperature; Reagent/catalyst; diastereoselective reaction; Inert atmosphere;

DOI:10.1002/chem.201403285

upstream raw materials:

benzalacetophenone

2-hydroxyphenyl boronic acid

styrene

2<α-(isopropylthio)benzyl>phenol