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20700-93-0

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20700-93-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20700-93-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,0 and 0 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20700-93:
(7*2)+(6*0)+(5*7)+(4*0)+(3*0)+(2*9)+(1*3)=70
70 % 10 = 0
So 20700-93-0 is a valid CAS Registry Number.

20700-93-0Downstream Products

20700-93-0Relevant articles and documents

Solventless mechanosynthesis of N-protected amino esters

Konnert, Laure,Lamaty, Frederic,Martinez, Jean,Colacino, Evelina

, p. 4008 - 4017 (2014/05/20)

Mechanochemical derivatizations of N- or C-protected amino acids were performed in a ball mill under solvent-free conditions. A vibrational ball mill was used for the preparation of N-protected α- and β-amino esters starting from the corresponding N-unmasked precursors via a carbamoylation reaction in the presence of di-tert-butyl dicarbonate (Boc2O), benzyl chloroformate (Z-Cl) or 9-fluorenylmethoxycarbonyl chloroformate (Fmoc-Cl). A planetary ball mill proved to be more suitable for the synthesis of amino esters from N-protected amino acids via a one-pot activation/esterification reaction in the presence of various dialkyl dicarbonates or chloroformates. The spot-to-spot reactions were straightforward, leading to the final products in reduced reaction times with improved yields and simplified work-up procedures.

Process for t-butylating hydroxy- or thiol-substituted amino acids

-

, (2008/06/13)

Hydroxy- or thiol-substituted amino acids are t-butylated by reacting them with isobutylene in the presence of a catalyst comprising boron trifluoride and anhydrous phosphoric acid.

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