68388-21-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 68388-21-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,3,8 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 68388-21:
(7*6)+(6*8)+(5*3)+(4*8)+(3*8)+(2*2)+(1*1)=166
166 % 10 = 6
So 68388-21-6 is a valid CAS Registry Number.
68388-21-6Relevant articles and documents
CHEMOSELECTIVE METHYLENATION WITH A METHYLENEDIANION SYNTHON
Okazoe, Takashi,Hibino, Jun-ichi,Takai, Kazuhiko,Nozaki, Hitosi
, p. 5581 - 5584 (1985)
The combination of CH2I2-Zn-Ti(OiPr)4 or CH2I2-Zn-Me3Al is effective for the selective methylenation of aldehydes.Selective methylenation of a ketone group is performed by pretreatment of a substrate with Ti(NEt2)4.