ChemicalBook CAS DataBase List R-(+)-6,6'-BIS(DIPHENYLPHOSPHINO)-2,2',3,3'-TETRAHYDRO-5,5'-BI-1,4-BENZODIOXIN

R-(+)-6,6'-BIS(DIPHENYLPHOSPHINO)-2,2',3,3'-TETRAHYDRO-5,5'-BI-1,4-BENZODIOXIN synthesis

5synthesis methods

Product Name:R-(+)-6,6'-BIS(DIPHENYLPHOSPHINO)-2,2',3,3'-TETRAHYDRO-5,5'-BI-1,4-BENZODIOXIN
CAS Number:503538-68-9
Molecular formula:C40H32O4P2
Molecular Weight:638.63

493-09-4 Synthesis

493-09-4
290 suppliers
$10.00/5 g

R-(+)-6,6'-BIS(DIPHENYLPHOSPHINO)-2,2',3,3'-TETRAHYDRO-5,5'-BI-1,4-BENZODIOXIN

503538-68-9
41 suppliers
$46.00/50mg

Yield:-

Steps:

Multi-step reaction with 7 steps
1.1: 100 percent / NBS / dimethylformamide / 24 h / 20 °C
2.1: n-BuLi / tetrahydrofuran; hexane / 1.17 h / -78 °C
2.2: tetrahydrofuran; hexane / -70 - 0 °C
3.1: aq. H₂O₂ / methanol / 1 h / 20 °C
4.1: t-BuLi / pentane; tetrahydrofuran / 3.5 h / -100 - -70 °C
4.2: I₂ / pentane; tetrahydrofuran / 2 h / -70 - 0 °C
5.1: Cu / dimethylformamide / 4 h / 140 °C
6.1: (+)-O,O-dibenzoyltartaric acid / CH₂Cl₂
6.2: aq. CH₂Cl₂ / CH₂Cl₂ / 0.5 h
7.1: 91 percent / NBu₃; HSiCl₃ / xylene / 140 °C

References:

Paule, Sebastien Duprat de;Jeulin, Severine;Ratovelomanana-Vidal, Virginie;Genet, Jean-Pierre;Champion, Nicolas;Dellis, Philippe [European Journal of Organic Chemistry,2003,# 10,p. 1931 - 1941]

52287-51-1 Synthesis

52287-51-1
229 suppliers
$6.00/1g

503538-68-9
41 suppliers
$46.00/50mg

References

Phosphine oxide, (2,3-dihydro-1,4-benzodioxin-6-yl)diphenyl-

445380-60-9
3 suppliers
inquiry

503538-68-9
41 suppliers
$46.00/50mg

References

Ethanamine, N-[(3,5-dichlorophenyl)methylene]-2,2-diethoxy-

1000210-73-0
0 suppliers
inquiry

503538-68-9
41 suppliers
$46.00/50mg

References

Phosphine oxide, (2,3-dihydro-5-iodo-1,4-benzodioxin-6-yl)diphenyl-

445380-61-0
0 suppliers
inquiry

503538-68-9
41 suppliers
$46.00/50mg

References

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R-(+)-6,6'-BIS(DIPHENYLPHOSPHINO)-2,2',3,3'-TETRAHYDRO-5,5'-BI-1,4-BENZODIOXIN synthesis