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71800-49-2

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71800-49-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71800-49-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,8,0 and 0 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 71800-49:
(7*7)+(6*1)+(5*8)+(4*0)+(3*0)+(2*4)+(1*9)=112
112 % 10 = 2
So 71800-49-2 is a valid CAS Registry Number.

71800-49-2Relevant articles and documents

Tetraethylorthosilicate as a mild dehydrating reagent for the synthesis of N-formamides with formic acid

Nishikawa, Yasuhiro,Nakamura, Hidetsugu,Ukai, Norimitsu,Adachi, Wakana,Hara, Osamu

, p. 860 - 863 (2017)

The synthesis of N-formamides with formic acid as a formyl source under mild conditions was achieved using tetraethylorthosilicate (TEOS), a low cost and environmentally benign reagent. The mild conditions in this system enable the formylation of a variety of amino acid derivatives including stereochemically labile phenylglycine ethyl ester with 96% ee. This new protocol could also be applied to simple amines including weakly basic aniline derivatives, giving various primary and secondary formamides.

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