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(1aS,4aR,5aR)-2,4-Dioxo-tetrahydro-3-oxa-1b-aza-cyclopropa[a]pentalene-1a-carboxylic acid 4-nitro-benzyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

134840-20-3

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134840-20-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134840-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,8,4 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 134840-20:
(8*1)+(7*3)+(6*4)+(5*8)+(4*4)+(3*0)+(2*2)+(1*0)=113
113 % 10 = 3
So 134840-20-3 is a valid CAS Registry Number.

134840-20-3Downstream Products

134840-20-3Relevant academic research and scientific papers

OZONOLYSIS OF ETHYLIDENE AZETIDINONES; OZONIDE FRAGMENTATION TO α-AMINO ACID-N-CARBOXYANHYDRIDES

Bateson, John H.,Kaura, Arun C.,Southgate, Robert

, p. 2065 - 2068 (1991)

Ozonolysis of α-ethylidene azetidinones (1) and (10) did not provide the expected α-oxoazetidinones, but afforded α-amino acid-N-carboxyanhydrides (3) and (11).

Olivanic Acid Analogues. Part 11. Ozonolysis of α-Ethylideneazetidinones: Ozonide Fragmentation to α-Amino Acid-N-carboxyanhydrides

Bateson, John H.,Fell, Stephen C. M.,Kaura, Arun C.,Southgate, Robert

, p. 1577 - 1582 (2007/10/02)

Ozonolysis of (E)-7-ethylideneoctane-2-spirocyclohexan>-8-one failed to provide the α-oxoazetidinone 2, but afforded an α-amino acid-N-carboxyanhydride nonane-2-spirocyclohexane>-7,9-dione 5. octane-2-spirocyclohexane>-7,8-dione 2 was instead obtained from the trans-ketone 9 by a sequence involving Baeyer-Villiger oxidation of the azido ketone 10.

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