155095-09-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 155095-09-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,0,9 and 5 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 155095-09:
(8*1)+(7*5)+(6*5)+(5*0)+(4*9)+(3*5)+(2*0)+(1*9)=133
133 % 10 = 3
So 155095-09-3 is a valid CAS Registry Number.
155095-09-3Relevant articles and documents
A new simple route to N,O-protected (S)-2-amino-4-oxobutyric acid
Dehmlow,Westerheide
, p. 1225 - 1226 (1993)
Methionine is converted into the N,O-protected derivative 1b. Chlorination of 1b with sulfuryl chloride results in a mixture of the α-halosulfides 2a and 2b in the ratio of 6:1. Hydrolysis of 2a gives the title compound 3 in 64% yield.
