71042-55-2 Usage
Reactions
Ligand used in the enantioselective rhodium catalyzed hydrogenation of α–dehydroaminoesters and enamides.
Ligand used in the enantioselective rhodium catalyzed hydroboration of cyclopropenes.
Ligand used in the asymmetric rhodium catalyzed cleavage of racemic 1,3-oxazolidines.
Iridium or Rhodium-catalyzed asymmetric Diels-Alder reaction.
Check Digit Verification of cas no
The CAS Registry Mumber 71042-55-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,0,4 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 71042-55:
(7*7)+(6*1)+(5*0)+(4*4)+(3*2)+(2*5)+(1*5)=92
92 % 10 = 2
So 71042-55-2 is a valid CAS Registry Number.
InChI:InChI=1/C31H28P2/c1-5-13-26(14-6-1)32(27-15-7-2-8-16-27)30-24-21-22-25(23-24)31(30)33(28-17-9-3-10-18-28)29-19-11-4-12-20-29/h1-22,24-25,30-31H,23H2/t24?,25?,30-,31-/m1/s1
71042-55-2Relevant articles and documents
Synthesis of (R,R)- and (S,S)-Norphos
Brunner, Henri,Muschiol, Manfred,Zabel, Manfred
, p. 405 - 408 (2008/09/21)
Oxidation of (E)-1,2-bis(diphenylphosphanyl)ethene with hydrogen peroxide gave (E)-1,2-bis(diphenylphosphoryl)ethene. Diels-Alder reaction of (E)-1,2-bis(diphenylphosphoryl)ethene with cyclopentadiene yielded 2,3-bis(diphenylphosphoryl)bicyclo[2.2.1]hept-5-ene (NorphosO). rac-NorphosO was resolved with O,O-dibenzoyltartaric acid. (R,R)- and (S,S)-NorphosO were reduced with trichlorosilane to give 2,3-bis(diphenylphosphanyl)bicyclo[2.2.1] hept-5-ene [(R,R)- and (S,S)-Norphos]. Georg Thieme Verlag Stuttgart.