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133643-21-7

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133643-21-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133643-21-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,6,4 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133643-21:
(8*1)+(7*3)+(6*3)+(5*6)+(4*4)+(3*3)+(2*2)+(1*1)=107
107 % 10 = 7
So 133643-21-7 is a valid CAS Registry Number.

133643-21-7Downstream Products

133643-21-7Relevant articles and documents

Chiral aminal templates: Diastereoselective addition to hydrazones; an asymmetric synthesis of α-amino aldehydes

Alexakis,Lensen,Tranchier,Mangeney,Feneau-Dupont,Declercq

, p. 1038 - 1050 (2007/10/02)

The monohydrazone of glyoxal may be derivatized into a chiral aminal with diamine 7. The resulting chiral reagent 13 reacts with complete diastereocontrol with organolithium reagents in THF. This sterically controlled reaction may be altered to chelation

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