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18977-34-9

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18977-34-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18977-34-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,9,7 and 7 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 18977-34:
(7*1)+(6*8)+(5*9)+(4*7)+(3*7)+(2*3)+(1*4)=159
159 % 10 = 9
So 18977-34-9 is a valid CAS Registry Number.

18977-34-9Downstream Products

18977-34-9Relevant articles and documents

Chemoselective Claisen-Schmidt bis-substitutional condensation catalyzed by an alkoxy-bridged dinuclear Ti(IV) cluster

Wu, Yufei,Hou, Jie,Liu, Yuliang,Zhang, Mingfu,Tung, Chen-Ho,Wang, Yifeng

, p. 1511 - 1516 (2016/03/01)

The highly efficient and chemoselective α,α′-bis-substitution of alkanones is important in organic synthesis. Herein, a dimeric titanium cluster, Ti2Cl2(OPri)6·2HOPri (Ti2), is used in the Claisen-Schmidt condensation reaction, for the selectively activation of symmetrical ketones containing α,α′-methylene groups and production of α,α′-bis-substituted alkanones in high efficiency and chemoselectivity. The high efficiency and chemoselectivity can be extended to a variety of typical alkanones and aromatic aldehydes. Both of the oxo-bridged dimeric motif of Ti2 and the ionic Ti-Cl bond are responsible for the high efficiency and chemoselectivity.

New Aziridines and Pyrazolines Derived from Diarylidenecycloalkanones

Kabli, R. A.,Kaddah, A. M.,Khalil, A. M.,Khalaf, A. A.

, p. 152 - 156 (2007/10/02)

A number of diarylidenecycloalkanones (I and II) have been prepared by the condensation of cycloalkanones with different aromatic aldehydes.Treatment of I and II with bromine gives the corresponding tetrabromides (III and IV).Compounds III react with meth

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