99940-70-2 Usage
Chemical class
Piperazinediones
Molar mass
232.28 g/mol
Chiral center
One (which leads to two enantiomers, (R)and (S)-)
Physical form
White to light yellow solid
Potential applications
Pharmaceuticals and organic synthesis (due to unique structure and properties)
Need for further research
Yes (to explore potential uses and effects)
Check Digit Verification of cas no
The CAS Registry Mumber 99940-70-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,4 and 0 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99940-70:
(7*9)+(6*9)+(5*9)+(4*4)+(3*0)+(2*7)+(1*0)=192
192 % 10 = 2
So 99940-70-2 is a valid CAS Registry Number.
99940-70-2Relevant articles and documents
Stereoselective synthesis of dipeptides - I
Favero, Valentina,Porzi, Gianni,Sandri, Sergio
, p. 599 - 612 (2007/10/03)
The alkylation of 7 occurs in moderate to good trans stereoselection (d.e.40-98%), while a poorer d.e. (40-98%) is observed for 8. On the contrary, in both substrates the alkylation with CH3I produces a greater amount of the cis isomer (d.e.48%).). Cleavage of the lactims 9(a,e) gives enantiomerically pure dipeptides 14(a,e). The absolute configuration of the introduced stereogenic centres has been assigned on the basis of the 1H-NMR data in connection with the conformational analysis.
