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22928-91-2

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22928-91-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22928-91-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,9,2 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 22928-91:
(7*2)+(6*2)+(5*9)+(4*2)+(3*8)+(2*9)+(1*1)=122
122 % 10 = 2
So 22928-91-2 is a valid CAS Registry Number.

22928-91-2Downstream Products

22928-91-2Relevant articles and documents

Stereospecific Synthesis of 2-Oxazinyl-4-oxoazetidinecarbamates Starting from a 1,2-Diazephine. A New Type of Intramolecular Transbenzoylation

Fritz, Hans,Henlin, Jean-Michel,Riesen, Andreas,Tschamber, Theophile,Zehnder, Margareta,Streith, Jacques

, p. 822 - 834 (1988)

Azetidinodiazepines 4b and 4c react with acylnitroso dienophiles 5a-c, specifically from their convexe α-side, but in a non-regiospecific way, leading thereby stereospecifically to the expected adducts 6a-d and 7a-d.The three-dimensional structures of 6a and 7a were determined by X-ray analyses which corroborated their NMR data.OsO4 cis-glycolization occured in good yield with the inverse adducts 7a and 7e and led to the rearranged products 10.These latter ones result from an intramolecular N- to O-transbenzoylation of the short-lived intermediates 9 followed by fragmentation of the aminal function.X-Ray analysis of 7a showed the N(10) atom to be pyramidal, a result which demonstrates that it does not have any pronounced benzamide character; otherwise no such N- to O-transbenzoylation would have taken place.Structure and relative configuration of 10a were ascertained by X-ray analysis which confirmed its NMR data as well as the stereochemical outcome of its formation.

Studies on diazepines. XVI. Synthesis of monocyclic 1,3-diazepines. (1). Thermolysis of 1,2-diazepines formed from methylpyridine N-imides

Kurita,Kojima,Tsuchiya

, p. 3688 - 3695 (2007/10/02)

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