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64091-23-2

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64091-23-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 64091-23-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,0,9 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 64091-23:
(7*6)+(6*4)+(5*0)+(4*9)+(3*1)+(2*2)+(1*3)=112
112 % 10 = 2
So 64091-23-2 is a valid CAS Registry Number.

64091-23-2Relevant articles and documents

IX. Mono- and biphasic asymmetric hydroformylation with rhodium catalysts of the diphosphine ligand NAPHOS and its sulfonated derivatives

Eckl, Robert W.,Priermeier, Thomas,Herrmann, Wolfgang A.

, p. 243 - 249 (2007/10/03)

Both enantiomers of the diphosphine 2,2′-bis(diphenylphosphinomethyl)-1,1′-binaphthyl NAPHOS were prepared by resolution of the racemic P,P′-dioxide and subsequently applied in the rhodium-catalyzed, asymmetric hydroformylation of styrene. Optically active, highly water-soluble derivatives BINAS were prepared by direct sulfonation of the enantiopure diphosphine NAPHOS and applied in aqueous/organic, two-phase hydroformylation of styrene. The catalytically active rhodium complexes HRh(CO)2(P-P) of both NAPHOS and BINAS were prepared and characterized by infrared and NMR spectroscopy. Optical yields are lower in two-phase hydroformylation compared with the conventional single-phase (organic solvent) technique.

Process for preparing tertiary diarylalkylphosphines

-

, (2008/06/13)

The invention relates to a process for preparing phosphines STR1 where, for example R1 is (C1 -C10)alkyl, (C3 -C10)cycloalkyl, C(YZ)aryl Y, Z is (C1 -C4)alkyl, hydrogen, Aryl is

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