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1193731-90-6

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1193731-90-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1193731-90-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,3,7,3 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1193731-90:
(9*1)+(8*1)+(7*9)+(6*3)+(5*7)+(4*3)+(3*1)+(2*9)+(1*0)=166
166 % 10 = 6
So 1193731-90-6 is a valid CAS Registry Number.

1193731-90-6Downstream Products

1193731-90-6Relevant articles and documents

Phthalides by rhodium-catalyzed ketone hydroacylation

Phan, Diem H. T.,Kim, Byoungmoo,Dong, Vy M.

supporting information; experimental part, p. 15608 - 15609 (2010/01/30)

(Chemical Equation Presented) Phthalides are biologically relevant five-membered lactones found in herbs, fruits, and vegetables. Herein we communicate the first atom-economical approach to phthalides by using enantioselective ketone hydroacylation. In the presence of Rh[(Duanphos)]X (X = NO3, OTf, OMs), various 2-ketobenzaldehydes undergo intramolecular hydroacylation to produce phthalide products in good yields and 92-98% ee's. Our study highlights the key role counterions play in controlling both reactivity and enantioselectivity. A concise asymmetric total synthesis of the celery extract (S)-(-)-3-n-butylphthalide is also presented.

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