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1404201-48-4

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1404201-48-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1404201-48-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,0,4,2,0 and 1 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1404201-48:
(9*1)+(8*4)+(7*0)+(6*4)+(5*2)+(4*0)+(3*1)+(2*4)+(1*8)=94
94 % 10 = 4
So 1404201-48-4 is a valid CAS Registry Number.

1404201-48-4Downstream Products

1404201-48-4Relevant articles and documents

Zn(OTf)2-promoted chemoselective esterification of hydroxyl group bearing carboxylic acids

Mamidi, Narsimha,Manna, Debasis

, p. 2386 - 2396 (2013/05/21)

Selective esterification of aliphatic and aromatic carboxylic acids with various alcohols is studied using triphenylphosphine, I2, and a catalytic amount of Zn(OTf)2. Use of this catalyst allows the formation of esters at a faster rate with good to excellent yield by activating the in situ generated acyloxyphosphonium ion intermediate. During the esterification process, both their aromatic and aliphatic hydroxyl groups are fully preserved from transesterification. The results show that the bulkiness and the reactivity of this doubly activated intermediate III control the selectivity and the rate of the reaction, respectively. The method is also useful for direct amidation reactions.

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