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115764-26-6

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115764-26-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 115764-26-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,5,7,6 and 4 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 115764-26:
(8*1)+(7*1)+(6*5)+(5*7)+(4*6)+(3*4)+(2*2)+(1*6)=126
126 % 10 = 6
So 115764-26-6 is a valid CAS Registry Number.

115764-26-6Relevant articles and documents

Enantioselective Synthesis of (3S)-trans-4-(Substituted Methyl)monobactams from 2,3-O-Isopropylidene-D-glyceraldehyde

Herranz, Rosario,Conde, Santiago,Fernandez-Resa, Piedad,Arribas, Enrique

, p. 649 - 656 (2007/10/02)

The enantioselective synthesis of various (3S)-trans-4-(substituted methyl)-2-oxoazetidine-1-sulphonic acid derivatives from 2,3-O-isopropylidene-D-glyceraldehyde is described.Reaction of this aldehyde with trimethylsilyl cyanide gave a 80:20 ratio of the corresponding threo and erythro α-amino-nitriles, which by amino protection and subsequent treatment with basic hydrogen peroxide provided the corresponding α-amino carboxamides.Successive selective protection, activation, sulphonation and, finally, stereospecific cyclization of the threo α-carboxamide yielded (2S,4R)-3-benzyloxycarbonylamino-4-hydroxymethyl-2-oxoazetidine-1-sulphonic acid, an intermediate for the synthesis of the corresponding 4-acyloxymethyl-, 4-carbamoyloxymethyl-, 4-methylsulphonyloxy-methyl-, 4-iodomethyl-, and 4-methyl-2-oxozetidines.

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