137304-45-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137304-45-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,3,0 and 4 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 137304-45:
(8*1)+(7*3)+(6*7)+(5*3)+(4*0)+(3*4)+(2*4)+(1*5)=111
111 % 10 = 1
So 137304-45-1 is a valid CAS Registry Number.
137304-45-1Relevant academic research and scientific papers
AN EFFICIENT AND CONVENIENT ROUTE TO SPIRO-FUSED γ-BUTYRO- AND δ-VALEROLACTONES
Kido, Fusao,Abiko, Toshiya,Kazi, Abul B.,Kato, Michiharu,Yoshikoshi, Akira
, p. 1487 - 1490 (2007/10/02)
Treatment of the α-diazomalonates (5a-c) of 2-ethanols with rhodium acetate led to the sigmatropic rearrangement of the cyclic allylsulfonium ylides (6a-c) to give the spiro-fused δ-valerolactones (7a-c) in excel
