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92973-27-8

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92973-27-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 92973-27-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,2,9,7 and 3 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 92973-27:
(7*9)+(6*2)+(5*9)+(4*7)+(3*3)+(2*2)+(1*7)=168
168 % 10 = 8
So 92973-27-8 is a valid CAS Registry Number.

92973-27-8Downstream Products

92973-27-8Relevant 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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