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128010-98-0

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128010-98-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128010-98-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,0,1 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128010-98:
(8*1)+(7*2)+(6*8)+(5*0)+(4*1)+(3*0)+(2*9)+(1*8)=100
100 % 10 = 0
So 128010-98-0 is a valid CAS Registry Number.

128010-98-0Downstream Products

128010-98-0Relevant articles and documents

Bicyclo[1.1.1]pentane-Derived Building Blocks for Click Chemistry

Kokhan, Serhii O.,Valter, Yevheniia B.,Tymtsunik, Andriy V.,Komarov, Igor V.,Grygorenko, Oleksandr O.

, p. 6450 - 6456 (2017/12/01)

Syntheses of bicyclo[1.1.1]pentane-derived azides and terminal alkynes – interesting substrates for click reactions – are described. With a few exceptions, these compounds were prepared in two or three steps starting from common synthetic intermediates – the corresponding carboxylic acids. The key step in the synthesis of 1-azidobicyclo[1.1.1]pentanes is a copper-catalysed diazo-transfer reaction with imidazole-1-sulfonyl azide. The preparation of bicyclo[1.1.1]pentyl-substituted alkynes relies on a Seyferth–Gilbert homologation with dimethyl 1-diazo-2-oxopropylphosphonate (Ohira–Bestmann reagent). Both types of target compounds were found to be suitable substrates for click reactions, and thus they are promising building blocks for medicinal, combinatorial and bioconjugate chemistry. A practically important side result of this study was a multigram preparation of Boc-monoprotected 1,3-diaminobicyclo[1.1.1]pentane – a representative bicyclic conformationally restricted diamine derivative.

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