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1027190-58-4

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1027190-58-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1027190-58-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,7,1,9 and 0 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1027190-58:
(9*1)+(8*0)+(7*2)+(6*7)+(5*1)+(4*9)+(3*0)+(2*5)+(1*8)=124
124 % 10 = 4
So 1027190-58-4 is a valid CAS Registry Number.

1027190-58-4Downstream Products

1027190-58-4Relevant articles and documents

A convenient synthesis of optically pure (2R, 3R)-2, 3-epoxysuccinyl - Dipeptides

Korn,Rudolph-Bohner,Moroder

, p. 8381 - 8392 (1994)

(2R,3R)-trans-Epoxysuccinyl-dipeptides (7a-7d) were synthesized by acylation of dipeptides with the N-hydroxysuccinimide or pentafluorophenyl ester of monoethyl (2R,3R)-trans-epoxysuccinate (6a-6b). A nucleophilic oxirane ring opening by N-hydroxysuccinimide and pentafluorophenol during the preparation of the active esters could not be observed. Subsequent saponification of the monoethyl ester 7a-7d with KOH in ethanolic solution allowed to produce the dipeptide derivatives as potassium salts (8a-8d) which were found to be stable on storage in the cold. The attempts to convert (2R,3R)-trans-epoxysuccinyl-glycyl-proline (7a) into the corresponding (2S,3S)-trans-epithiosuccinyl derivative via an oxygen sulfur exchange reaction with 3-methylbenzothiazole-2-thione failed completely as among the various products of unknown nature formed only the desulfurated fumaryl derivative could be isolated and characterized.

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