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1422721-78-5

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1422721-78-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1422721-78-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,2,7,2 and 1 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1422721-78:
(9*1)+(8*4)+(7*2)+(6*2)+(5*7)+(4*2)+(3*1)+(2*7)+(1*8)=135
135 % 10 = 5
So 1422721-78-5 is a valid CAS Registry Number.

1422721-78-5Relevant articles and documents

Stereoselective Synthesis of Pyrido- and Pyrrolo[1,2-c][1,3]oxazin-1-ones via a Nucleophilic Addition-Cyclization Process of N,O-Acetal with Ynamides

Han, Pan,Mao, Zhuo-Ya,Si, Chang-Mei,Zhou, Zhu,Wei, Bang-Guo,Lin, Guo-Qiang

, p. 914 - 923 (2019)

An efficient asymmetric approach to access functionalized pyrido- and pyrrolo[1,2-c][1,3]oxazin-1-ones has been developed through a nucleophilic addition-cyclization process of N,O-acetal with ynamides. A number of substituted ynamides 8a-8o and 3-silyloxypyrrolidine or piperidine N,O-acetals 6a, 7 were amenable to this transformation, and the desired products 9a-9o, 10a-10m were obtained with excellent regioselectivities and outstanding diastereoselectivities. Moreover, chiral ynamides 14a-14f could also experience this addition-cyclization process to afford products 15a-15f in excellent yields.

Regio- and stereospecific synthesis of (E)-α-iodoenamide moieties from ynamides through iodotrimethylsilane-mediated hydroiodation

Sato, Akihiro H.,Ohashi, Kazuhiro,Iwasawa, Tetsuo

, p. 1309 - 1311 (2013/03/13)

A facile approach to (E)-α-haloenamide moieties from ynamides using bromo- or iodotrimethylsilane is described. The simple protocol enables a regio- and stereospecific hydrohalogenation of the triple bond in gram-scale and provides a general entry for synthesis of novel enamide analogues.

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