157905-03-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157905-03-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,9,0 and 5 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 157905-03:
(8*1)+(7*5)+(6*7)+(5*9)+(4*0)+(3*5)+(2*0)+(1*3)=148
148 % 10 = 8
So 157905-03-8 is a valid CAS Registry Number.
157905-03-8Relevant articles and documents
Asymmetric synthesis of 3-hydroxyprolines by photocyclization of N-(2-benzoylethyl)glycinamides
Wessig,Wettstein,Giese,Neuburger,Zehnder
, p. 829 - 837 (2007/10/02)
The chiral N-(2-benzoylethyl)-N-tosylglycinamides 1a-c were prepared from the C2-symmetric pyrrolidines 5a-c. Irradiation of these ketones 1a-c gave cis-3-hydroxyprolinamides 10-12 in moderate to good yields (Scheme 3). The de of the photocycli