142236-56-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142236-56-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,2,3 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 142236-56:
(8*1)+(7*4)+(6*2)+(5*2)+(4*3)+(3*6)+(2*5)+(1*6)=104
104 % 10 = 4
So 142236-56-4 is a valid CAS Registry Number.
142236-56-4Relevant articles and documents
A NEW EVIDENCE FOR THE PRESENCE OF A SPIROINDOLENIUM SPECIES IN THE PICTET-SPENGLER REACTION
Kawate, Tomohiko,Nakagawa, Masako,Ogata, Koreharu,Hino, Tohru
, p. 801 - 811 (2007/10/02)
The Pictet-Spengler reaction of the imine (9) with chloro (-)-diisopinocamphenylborane yielded optically active spiroindolines (14) and (15), providing a new evidence for the presence of a spiroindolenium intermediate.
