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136881-87-3

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136881-87-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136881-87-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,8,8 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 136881-87:
(8*1)+(7*3)+(6*6)+(5*8)+(4*8)+(3*1)+(2*8)+(1*7)=163
163 % 10 = 3
So 136881-87-3 is a valid CAS Registry Number.

136881-87-3Relevant articles and documents

Design and synthesis of new 5-aryl-4-arylethynyl-1H-1,2,3-triazoles with valuable photophysical and biological properties

Efremova, Mariia M.,Govdi, Anastasia I.,Frolova, Valeria V.,Rumyantsev, Andrey M.,Balova, Irina A.

, (2021/05/28)

Cu-catalyzed 1,3-dipolar cycloaddition of methyl 2-azidoacetate to iodobuta-1,3-diynes and subsequent Suzuki-Miyaura cross-coupling were used to synthesize new triazoles derivatives: 5aryl-4-arylethynyl-1H-1,2,3-triazoles. Investigation of their optical p

Tuning of cross-Glaser products mediated by substrate-catalyst polymeric backbone interactions

Ali, Md. Ehesan,Dar, Arif Hassan,Gowri, Vijayendran,Jayamurugan, Govindasamy,Kaur, Sharanjeet,Mukhopadhyaya, Aritra,Neethu, K. M.,Sartaliya, Shaifali,Selim, Abdul

supporting information, p. 2582 - 2585 (2020/03/10)

Tuning of cross-Glaser products using different polymeric backbones supported by copper oxide nano-catalysts has been demonstrated by tweaking the substrate-catalyst interactions under greener conditions. Further, highly reactive magnetically separable and recyclable catalyst with scalability is demonstrated.

One-pot synthesis of unsymmetrical 1,3-butadiyne derivatives and their application in the synthesis of unsymmetrical 2,5-diarylthiophenes

Andrade, Camila B.,Carvalho, Diego B.,Trefzger, Ozildéia S.,Kassab, Najla M.,Guerrero, Palimécio G.,Barbosa, Sandro L.,Shiguemoto, Cristiane Y. K.,Baroni, Adriano C. M.

, p. 696 - 704 (2019/01/04)

A one-pot protocol was developed for the synthesis of unsymmetrical 1,3-butadiynes. The procedure is based on two sequential reactions: deprotection of R–C≡C–C≡C– C(Me)2OH derivatives in a retro-Favorskii reaction to furnish a terminal 1,3-butadiyne compound, which reacted with aryl iod-ides in a Sonogashira-type cross-coupling reaction catalyzed by Pd(PPh3)4 and CuI, using TBAOH as activator and toluene as solvent under reflux for 10 min. We also studied in situ thiocycli-zation of 1,3-butadiynes, leading to unsymmetrical 2,5-diaryl-thiophenes. The principal features of this method are operational simplicity, good substrate scope, very fast reaction, and high yields.

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