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1603833-13-1

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1603833-13-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1603833-13-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,3,8,3 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1603833-13:
(9*1)+(8*6)+(7*0)+(6*3)+(5*8)+(4*3)+(3*3)+(2*1)+(1*3)=141
141 % 10 = 1
So 1603833-13-1 is a valid CAS Registry Number.

1603833-13-1Relevant articles and documents

Synthesis of Monothiomalonates – Versatile Thioester Enolate Equivalents for C–C Bond Formations

Engl, Oliver D.,Saadi, Jakub,Cosimi, Elena,Wennemers, Helma

, (2017/12/01)

Monothiomalonates (MTMs) are surrogates of thioester enolates that allow for stereoselective C–C bond formations under mild conditions and thereby afford access to synthetically versatile thioester derivatives. Here we present a straightforward synthetic route to MTMs that proceeds through nucleophilic ring-opening of Meldrum's acid derivatives followed by O-alkylation of the resulting malonic acid half thioesters with alkyl triflates or acetimidates as electrophiles. The method affords MTMs in overall yields of 34?–?92% and allows for variations of the oxo- and thioester moieties as well as the substituent at the C(α) position.

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