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22437-44-1

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22437-44-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22437-44-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,4,3 and 7 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 22437-44:
(7*2)+(6*2)+(5*4)+(4*3)+(3*7)+(2*4)+(1*4)=91
91 % 10 = 1
So 22437-44-1 is a valid CAS Registry Number.

22437-44-1Relevant articles and documents

Thio-Michael addition of α,β-unsaturated amides catalyzed by Nmm-based ionic liquids

Liu, Yawei,Lai, Zhenzhen,Yang, Pengkun,Xu, Yuanqing,Zhang, Wenkai,Liu, Baoying,Lu, Minghua,Chang, Haibo,Ding, Tao,Xu, Hao

, p. 43104 - 43113 (2017/09/15)

A simple and practical thio-Michael addition of α,β-unsaturated amides catalyzed by Nmm-based ionic liquids with a 1,2-propanediol group has been developed. All the α,β-unsaturated amides without substituents at the carbon end could smoothly react with su

Chemistry of O-silylated ketene acetals: A mild and convenient synthesis of β-lactam antibiotics

Kita,Shibata,Tamura,Miki

, p. 2225 - 2232 (2007/10/02)

β-Amido sulfoxides (1) reacted with O-silylated ketene acetal (16) in dry acetonitrile in the presence of a catalytic amount of zinc iodide to give the 4-phenylthioazetidin-2-ones (17). Oxidation of 17 with m-chloroperbenzoic acid gave the corresponding s

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