138189-19-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138189-19-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,1,8 and 9 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 138189-19:
(8*1)+(7*3)+(6*8)+(5*1)+(4*8)+(3*9)+(2*1)+(1*9)=152
152 % 10 = 2
So 138189-19-2 is a valid CAS Registry Number.
138189-19-2Relevant academic research and scientific papers
Synthesis of 2-Amino-Substituted 4,5-Dihydro-1,3-thiazoles
Richter, C.,Hobert, A.,Meisner, W.,Schulze, K.
, p. 407 - 412 (2007/10/02)
The reaction of 2-substituted 4-methallylthiosemicarbazides 1 with carbonyl compounds catalyzed by weak acids gives the thiosemicarbazones 2 and 1,2,4-triazolidine-3-thiones 3.By contrats under strong acidic conditions the reaction occurs by electrophilic
