93700-99-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 93700-99-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,7,0 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 93700-99:
(7*9)+(6*3)+(5*7)+(4*0)+(3*0)+(2*9)+(1*9)=143
143 % 10 = 3
So 93700-99-3 is a valid CAS Registry Number.
93700-99-3Relevant academic research and scientific papers
A NOVEL STEREOSELECTIVE SYNTHESIS OF A CHIRAL KEY INTERMEDIATE FOR THE PREPARATION OF VITAMIN D3
Hatakeyama, Susumi,Numata, Hirotoshi,Takano, Seiichi
, p. 3617 - 3620 (2007/10/02)
The cyclopentanone 3a, a key intermediate in the synthesis of vitamin D3 and its metabolites, has been prepared in optical active form using (S)-γ-trityloxymethyl-γ-butyrolactone (6) as a chiral building block.
