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(S,S)-1,2-Ethanediylbis(methylphenylphosphine oxide), also known as (S,S)-DIOP, is a chiral ligand used in asymmetric catalysis. It is a white crystalline solid with the molecular formula C18H21O2P2 and a molecular weight of 340.31 g/mol. The compound consists of two methylphenylphosphine oxide groups connected by a 1,2-ethanediyl bridge, with the (S,S) configuration indicating that both chiral centers have the same configuration. (S,S)-DIOP is widely used in the synthesis of various enantiomerically pure compounds, particularly in the rhodium-catalyzed hydrogenation of olefins, due to its ability to provide high enantioselectivity and reactivity. It is also known for its stability and ease of synthesis, making it a popular choice among chemists for asymmetric catalysis applications.

7617-40-5

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7617-40-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7617-40-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,6,1 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 7617-40:
(6*7)+(5*6)+(4*1)+(3*7)+(2*4)+(1*0)=105
105 % 10 = 5
So 7617-40-5 is a valid CAS Registry Number.

7617-40-5Downstream Products

7617-40-5Relevant academic research and scientific papers

STEREOSPECIFIC REDUCTION OF DIASTEREOMERICALLY PURE MENTHYL PHOSPHINATES: A NEW ROUTE TO OPTICALLY ACTIVE PHOSPHINE OXIDES

Koide, Yasuhiro,Sakamoto, Atsushi,Imamoto, Tsuneo

, p. 3375 - 3376 (2007/10/02)

Diastereomerically pure menthyl phosphinates are stereospecifically reduced by lithium 4,4'-di-tert-butylbiphenylide.Subsequent treatment with alkyl halides affords phosphine oxides with high optical purity.

DETERMINATION OF THE ABSOLUTE CONFIGURATIONS OF 1,2-DIPHOSPHINYLETHENES POSSESSING TWO NONEQUIVALENT ASYMMETRIC PHOSPHORUS CENTRES. CRYSTAL STRUCTURE OF (R,S)-1-(tert-BUTYLPHENYLPHOSPHINYL)-2-(METHYL-PHENYLPHOSPHINYL)ETHANE.

Pietrusiewicz, K. Michal,Zablocka,Maria,Wieczorek, Wanda

, p. 183 - 190 (2007/10/02)

Using signle-crystal X-ray diffraction technique the R,S configuration has been assigned to a homochiral (-)-1-tert-butylphenylphosphinyl-2-methhylphenylphosphinylethane.This has allowed the assignment of absolute configuration also to its P1-epimer as we

OPTICALLY ACTIVE PHOSPHINE OXIDES. 4. A STRAIGHTFORWARD SYNTHESIS OF P-CHIRAL 1,2-DIPHOSPHINOYLETHANES.

Pietrusiewicz, K. Michal,Zablocka, Maria

, p. 1987 - 1990 (2007/10/02)

The title compounds possesing either one or two homochiral phosphorus centres are conveniently prepared via non-catalyzed addition of secondary phosphine oxides to an optically active vinyl phosphine oxide.

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